Anali za istrske in mediteranske študijeAnnali di Studi istriani e mediterranei Annals for Istrian and Mediterranean Studies UDK 5 Annales, Ser. hist. nat., 29, 2019, 2, pp. 159-280, Koper 2019 ISSN1408-533X UDK 5 ISSN 1408-533X (Print) ISSN 2591-1783 (Online) Anali za istrske in mediteranske študije Annali di Studi istriani e mediterranei Annals for Istrian and Mediterranean Studies Series Historia Naturalis, 29, 2019, 2 KOPER 2019 Anali za istrske in mediteranske študije - Annali di Studi istriani e mediterranei - Annals for Istrian and Mediterranean Studies ISSN 1408-533X (Tiskana izd.) UDK 5 Letnik 29, leto 2019, številka 2 ISSN 2591-1783 (Spletna izd.) Alessandro Acquavita (IT), Nicola Bettoso (IT), Christian Capapé UREDNIŠKI ODBOR/ (FR), Darko Darovec, Dušan Devetak, Jakov Dulčić (HR), Serena COMITATO DI REDAZIONE/ Fonda Umani (IT), Andrej Gogala, Daniel Golani (IL), Danijel BOARD OF EDITORS: Ivajnšič, Mitja Kaligarič, Marcelo Kovačič (HR), Andrej Kranjc, Lovrenc Lipej, Vesna Mačić (ME), Alenka Malej, Patricija Mozetič, Martina Orlando-Bonaca, Michael Stachowitsch (AT), Tom Turk, Al Vrezec Glavni urednik/Redattore capo/ Editor in chief: Darko Darovec Odgovorni urednik naravoslovja/ Redattore responsabile per le scienze naturali/Natural Science Editor: Lovrenc Lipej Urednica/Redattrice/Editor: Martina Orlando-Bonaca Lektor/Supervisione/Language editor: Polona Šergon (sl.), Petra Berlot Kužner (angl.) Prevajalci/Traduttori/Translators: Martina Orlando-Bonaca (sl./it.) Oblikovalec/Progetto grafico/ Graphic design: Dušan Podgornik, Lovrenc Lipej Tisk/Stampa/Print: Založništvo PADRE d.o.o. 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Vsi članki so v barvni verziji prosto dostopni na spletni strani: http://zdjp.si/p/annalesshn/ All articles are freely available in color via website: http://zdjp.si/en/p/annalesshn/ Anali za istrske in mediteranske študije - Annali di Studi istriani e mediterranei - Annals for Istrian and Mediterranean Studies UDK 5 Letnik 29, Koper 2019, številka 2 ISSN 1408-533X (Print) ISSN 2591-1783 (Online) VSEBINA / INDICE GENERALE / CONTENTS 2019(2) 50 LET MORSKE BIOLOŠKE POSTAJE NACIONALNEGA INŠTITUTA ZA BIOLOGIJO I 50 ANNI DELLA STAZIONE DI BIOLOGIA MARINA DELL'ISTITUTO NAZIONALE DI BIOLOGIA 50 YEARS OF THE MARINE BIOLOGY STATION OF THE NATIONAL INSTITUTE OF BIOLOGY Lovrenc LIPEJ, Domen TRKOV, Domen STANIČ, Sara CERNICH & Saul CIRIACO First Record of Sergeant Major, Abudefduf saxatilis (Linnaeus, 1758) in the Adriatic Sea ......... 159 Prvi zapis o pojavljanju velikega seržanta, Abudefduf saxatilis (Linnaeus, 1758) v Jadranskem morju Valentina PITACCO & Selahattin Ünsal KARHAN First Record of Flabelliderma cinari Karhan, Simboura & Salazar-Vallejo, 2012 (Polychaeta: Flabelligeridae) from the Adriatic Sea ................... 167 Prvi zapis o pojavljanju vrste Flabelliderma cinari Karhan, Simboura & Salazar-Vallejo, 2012 (Polychaeta: Flabelligeridae) v Jadranskem morju Ana FORTIČ, Domen TRKOV, Borut MAVRIČ & Lovrenc LIPEJ Assessment of Bryozoan Xenodiversity in the Slovenian Coastal Sea ................................. 173 Ocena ksenodiverzitete mahovnjakov v slovenskem obalnem morju Martina ORLANDO-BONACA, Janja FRANCÉ, Borut MAVRIČ & Lovrenc LIPEJ Impact of the Port of Koper on Cymodocea nodosa Meadow ............................... 187 Vpliv koprskega pristanišča na travnik kolenčaste cimodoceje (Cymodocea nodosa) IHTIOLOGIJA ITTIOLOGIA ICHTHYOLOGY Akraam Faraj KARA, Mohamed AL HAJAJI, Hisham GHMATI & Esmail A. SHAKMAN Food and Feeding Habits of Mustelus mustelus (Linnaeus, 1758) (Chondrichthyes: Triakidae) Along the Western Coast of Libya ......................... Prehranjevalne navade navadnega morskega psa, Mustelus mustelus (Linnaeus, 1758) (Chondrichthyes: Triakidae), vzdolž zahodne obale Libije Youssouph DIATTA, Almamy DIABY, Sihem RAFRAFI-NOUIRA & Christian CAPAPÉ Capture of a Rare Endangered Species Leafscale Gulper Shark Centrophorus squamosus (Chondrichthyes: Squalidae) from the Coast of Senegal (Eastern Tropical Atlantic) .................... Ulov redkega in ogroženega morskega psa Centrophorus squamosus (Chondrichthyes: Squalidae) iz obalnih voda Senegala (vzhodni tropski Atlantik) Sihem RAFRAFI-NOUIRA, Christian REYNAUD & Christian CAPAPÉ Morphological Deformities in a Striped Sea Bream Lithognathus mormyrus (Osteichthyes: Sparidae) from Northern Tunisian Waters (Central Mediterranean Sea) ................................. Morfološke deformacije pri ovčici Lithognathus mormyrus (Osteichthyes: Sparidae) iz severno tunizijskih vod (osrednje Sredozemsko morje) 197 205 211 Sihem RAFRAFI-NOUIRA, Christian REYNAUD & Christian CAPAPÉ On a Occurrence of Gadella maraldi (Osteichthyes: Gadiformes: Moridae) on the Tunisian Coast (Central Mediterranean Sea) .......... 219 O pojavljanju vrste Gadella maraldi (Osteichthyes: Gadiformes: Moridae) ob tunizijski obali (osrednje Sredozemsko morje) Mohamed Mourad BEN AMOR, Marouene BDIOUI, Khadija OUNIFI-BEN AMOR, Christian REYNAUD & Christian CAPAPÉ Unusual Record of Round Fantail Stingray Taeniurops grabata (Chondrichthyes: Dasyatidae) from the Tunisian Coast (Central Mediterranean Sea) ................................. 223 Nenavadni zapis o pojavljanju morskega biča vrste Taeniurops grabata (Chondrichthyes: Dasyatidae) iz tunizijskih voda (osrednje Sredozemsko morje) JADRANSKA MORSKA FAVNA FAUNA MARINA ADRIATICA ADRIATIC MARINE FAUNA Roland R. MELZER, Martin HEß, Manuel A. STAGGL, Tihomir MAKOVEC & Borut MAVRIČ Hippolyte prideauxiana Leach, 1817: First Record for the Northern Adriatic and Observations on Mimetic Colouration .................. 231 Hippolyte prideauxiana Leach, 1817: prvi zapis o pojavljanju v severnem Jadranu s podatki o barvnemu prikrivanju Mona REZAEI, Al VREZEC, Borut MAVRIČ & Lovrenc LIPEJ Biometry and Population Gender Structure of Three Crab Species (Crustacea: Decapoda) from Sandy Bottom in the Northern Adriatic Sea ................................. 235 Biometrija in spolna struktura pri treh vrstah rakovic (Crustacea: Decapoda) iz sedimentnega dna severnega Jadrana ONESNAŽEVANJE OKOLJA INQUINAMENTO DELL’AMBIENTE ENVIRONMENTAL POLLUTION Sezginer TUNÇER, Sedat GÜNDOGDU, Cem ÇEVIK & Aytug ZILIFLI Belone belone (Linnaeus, 1760) and Spicara smaris (Linnaeus, 1758) Entangled in Plastic Collars in the Dardanelles Strait, Turkey ............... 247 Iglica, Belone belone (Linnaeus, 1760), in girica, Spicara smaris (Linnaeus, 1758), zapleteni v plastični ovoj v ožini Dardanele, Turčija Jamila FLIOU, Ali AMECHROUQ, Mohammed ELHOURRI, Ouassima RIFFI & Mostafa EL IDRISSI Determination of Heavy Metal Content in a Daphne gnidium L. Plant Using Atomic Absorption Spectroscopy ...................................... 253 Določevanje vsebnosti težkih kovin v volčinu vrste Daphne gnidium L. z uporabo atomske absorbcijske spektroskopije DELO NAŠIH ZAVODOV IN DRUŠTEV ATTIVITA DEI NOSTRI ISTITUTI E SOCIETA ACTIVITIES BY OUR INSTITUTIONS AND ASSOCIATIONS Simon KERMA Half a Century of the Marine Biology Station Piran ............................................ 261 Pol stoletja delovanja Morske biološke postaje Piran Navodila avtorjem ................................................ 267 Istruzioni per gli autori .......................................... 269 Instruction to Authors ............................................ 271 Kazalo k slikam na ovitku ..................................... 273 Index to images on the cover ................................ 273 received: 2019-10-10 DOI 10.19233/ASHN.2019.15 FIRST RECORD OF SERGEANT MAJOR, ABUDEFDUF SAXATILIS (LINNAEUS, 1758) IN THE ADRIATIC SEA Lovrenc LIPEJ & Domen TRKOV Marine Biology Station, National Institute of Biology Piran, SI-6330 Piran, Slovenia e-mail: lovrenc.lipej@nib.si Domen STANIČ DOPPS, Tržaška cesta 2, SI-1000 Ljubljana, Slovenia Sara CERNICH Agency for Nature Conservation, SI-6310 Izola, Slovenia Saul CIRIACO WWF Miramare, Strada Costiera 334, Trieste, Italy ABSTRACT A specimen of Segeant major Abudefduf saxatilis (Linnaeus, 1758) was observed in a shallow rocky area for several weeks in August and September 2019 at Punta Sottile, in waters off Muggia (Gulf of Trieste). The specimen probably entered the Strait of Gibraltar and arrived at northernmost limits of the Adriatic Sea. This is the first record for this species in the Gulf of Trieste and also the Adriatic Sea. Key words: Sergeant major, damselfish, first record, Atlantic influx, Gulf of Trieste PRIMO RITROVAMENTO DI DAMIGELLA A STRISCE, ABUDEFDUF SAXATILIS (LINNAEUS, 1758) IN MARE ADRIATICO SINTESI Un esemplare di damigella a strisce Abudefduf saxatilis (Linnaeus, 1758) e stato osservato in una zona rocciosa poco profonda per diverse settimane ad agosto e settembre 2019, a Punta Sottile, nelle acque al largo di Muggia (Golfo di Trieste). L’esemplare probabilmente e entrato dallo stretto di Gibilterra ed e arrivato ai limiti piu settentrionali del mare Adriatico. Si tratta della prima segnalazione per questa specie nel Golfo di Trieste e anche nell’Adriatico. Parole chiave: damigella a strisce, castagnole, primo ritrovamento, afflusso atlantico, Golfo di Trieste 159 INTRODUCTION In recent years, many fish species of tropical origin have been reported from different areas of the Mediter­ranean Sea. The majority of them enter the Mediter­ranean Sea through the Suez Canal and are known as Lessepsian migrants. During the last decades, the arrival of newcomers has accelerated due to rapid biotic glo­balization and various anthropogenic factors such as mariculture, maritime transport, the aquarium trade and others (see Zenetos et al., 2012, 2016; Tsiamis et al., 2018). Certain Atlantic newcomers have also entered the Mediterranean basin through the strait of Gibraltar and could be considered as evidence of natural range expansion (sensu Occhipinti et al., 2011), unaided by human activities (Zenetos et al., 2012). Higher tempera­tures during last decades also enable the spreading of Atlantic fish species into the Mediterranean Sea (Bianchi, 2007). They include many tropical coral reef dwelling fish entering the Mediterranean Sea through both gates. The Gulf of Trieste, which is the northernmost part of the Adriatic Sea, has withnessed the arrival of some alien species or species related to the phenomenon of tropicalisation. In this paper, we report on the sighting of Abudefduf saxatilis (Linnaeus, 1758) at Punta Sottile (Muggia) near Trieste in the summer months of 2019. To our knowledge, this is the very first evidence of the species’s appearance in the Adriatic Sea. MATERIAL AND METHODS On August 16th 2019, a single specimen of a non­native damselfish was sighted during snorkeling along the coast off Punta Sottile in the Italian part of the Gulf of Trieste (Figs. 1a and c). The specimen was swimming in waters less than 2 m deep (45o 36‘ 13‘‘ N; 013o 43’ 05‘‘ E), in a low vegetation habitat (turf) (Fig. 1b). The specimen was seen picking organisms on the sea floor and pinch­ing the combjelly Mnemiopsis leidyi, present at the time in high density. The species was easy to approach to a distance of only few decimeters. All tentatives to collect the observed specimen with SCUBA diving equipment failed; however, photographic material obtained using a Fuji camera, Finepix XP140, was helpful for species de­termination. The specimen was observed regularly with the last sighting documented on 16th September 2019. RESULTS AND DISCUSSION The specimen was identified as a pomatocentrid spe­cies of the genus Abudefduf due to an oval compressed body, typical colour pattern with light and five blue-black dark vertical bands, and forked tail. Abudefduf saxatilis is often confused with a similar Indopacific relative A. vaigiensis (Quoy & Gaimard, 1825) (Fig. 2, below), which has already been reported from the Mediterra­nean Sea as Lessepsian migrant (Bariche et al., 2015; Vella et al., 2016a). In fact, both species are considered as cryptic species, that do not differ in terms of meristic counts and morphometric parameters (Deidun & Cas­triota, 2014), although they are not sympatric in their original biogeographic provinces. Some authors such as Tsadok et al. (2015) have expressed doubts about the occurrence of A. vaigiensis in the Mediterranean Sea. However, we checked the photographic material and tried to identify the species according to morphological characters. The specimen was identified as A. saxatilis (Fig, 2, above) due to the following characteristics (see Allen, 1991; Randall, 1996; Deidun & Castriota, 2014): the origin of the fourth vertical bar is located at the last dorsal spine or immediately behind it (Fig 2, arrow A); the extention of the fifth dark vertical bar from the origin of the dorsal fin to the anal fin (Fig 2; arrows B1 and B2); and the presence of two dark dots on the caudal peduncle (Fig. 2, arrow C). A complete description of the species is available in Allen (1991). Damselfishes (family Pomacentridae) are common inhabitants of rocky sea floors and coral reefs (Allen, 1991). The Sergeant major is an abundant coral reef fish, generally dwelling in shallow waters up to 10 m of depth. It is normally present in schools. It is an herbivorous fish, feeding on different algae on the sea floor (Allen, 1991). However, young specimens were observed participating in cleaning symbiosis, picking ectoparasites and necrotic tissue from nectonic organ­isms such as marine turtles (Grossmann et al., 2006). The authors of this contribution also prepared and published information on the occurrence of Sergeant major in the local Slovenian (Lipej, 2019) and Italian media (Anonymous, 2019). Subsequently, a reader contacted us and informed us that such a specimen was sighted almost daily from June to August in an embay­ment of the marine protected area of Strunjan (Mesečev zaliv, Slovenia). It was observed cruising among giant boulders, resembling a small reef, in shallow waters below 2 m of depth. We checked whether the speci­men was still present in the area on 12th September, but without success. It is probable that the observed specimen is the same as the one of Punta Sottile. This sighting represents the first record of A. saxatilis in the Gulf of Trieste and, as far as we know, also in the Adriatic Sea. The first occurrence of the Sergeant major in the Mediterranean Sea was reported by Azzurro et al. (2013) when a specimen was sighted and photographed in shallow waters along the coast of Tarragona, Spain. The presence of A. saxatilis has also been confirmed in Maltese (see Deidun & Castriota, 2014; Vella et al., 2016a), Turkish (Bilecenoglu, 2016) and Israeli waters (Tsadok et al., 2015) (Tab. 1). Fig. 2: Comparison of two similar species of Abudefduf, both already recorded in the Mediterranean Sea as al­ien species. Above is the studied specimen of A. saxatilis from Punta Sottile (Photo: D. Stanič) and below a speci­men of A. vaigiensis from the island of Bali, Indonesia (Photo: B. Furlan). The arrow A shows that in A. saxatilis the origin of the 4th vertical bar is located under the last dorsal spine, while in A. vaigiensis it is placed behind the spine in the soft part of the dorsal fin. The arrow B1 shows the extension of the 5th black vertical bar from the origin of the dorsal fin to the anal fin in A. saxatilis, which is shorter and discontinued in A. vaigiensis and is located on the caudal peduncle (arrow B2). The arrow C shows the presence of two dark dots on the caudal peduncle in A. saxatilis. Sl. 2: Primerjava dveh zelo podobnih vrst seržantov iz rodu Abudefduf, ki sta že bili zabeleženi v Sredozem­skem morju kot tujerodni vrsti. Zgoraj je obravnavani primerek vrste A. saxatilis iz Tankega rtiča (Foto: D. Stanič), spodaj pa primerek vrste A. vaigiensis iz voda blizu otoka Bali, Indonezija (Foto: B. Furlan). Puščica A označuje, da je pri vrsti A. saxatilis začetek četrte navpične proge pod zadnjim trnom hrbtne plavuti, medtem ko je pri vrsti A. vaigiensis nameščen za trnom v delu hrbtne plavuti z mehkimi plavutnicami. Puščica B1 označuje razširitev pete navpične proge, ki se prične od osnove hrbtne plavuti do podrepne plavuti pri vrsti A. saxatilis, ki pa je krajša in prekinjena pri vrsti A. vaigiensis, obenem pa je nameščena na repnem korenu (puščica B2). Puščica C označuje navzočnost dveh tem­nih pik na repnem korenu pri vrsti A. saxatilis. To date, at least six alien damselfish species have been recorded in the Mediterranean Sea. A closely related species Abudefduf vaigiensis (Allen, 1991) has also been reported from the Mediterranean Sea as a Lessepsian migrant (Tardent 1959; Goren & Galil 1998; Vacchi & Chiantore 2000; Vella et al., 2016a). The African sergeant major, A. hoefleri (Vella et al., 2016b) was caught in Maltese waters, whereas the Scissortail Segeant, A. sexfasciatus, was recently reported from the Aegean Sea by Giovos et al. (2018). Other alien damselfishes have been recorded in the Mediterranean Sea such as Stegastes variabilis (Vella et al., 2015) and Chrysiptera hemicyanea (Deidun et al., 2018), both in Maltese waters. Chrysiptera cyanea, on the other hand has been recorded in Portorož, in Slovenian waters (Lipej et al., 2014a). The arrival of species of tropical origin in the Mediter­ranean Sea could be attributed to different reasons such as Lessepsian migration, Atlantic influx, drift, ballast waters or acquarium trade. The later two reasons seem to be less probable. In fact, Ben Rais Lasram & Mouil-lot (2009) stated that “the introduction of fish into the Mediterranean Sea by ships and aquaculture-mediated introductions is extremely rare”. However, in the case of another damselfish, the Blue Devil, C. cyanea, reported in the waters off Piran (Slovenia), the intentional release of the species from an acquarium seems very reason­able (Lipej et al., 2014a). The native area of distribution of A. saxatilis is the Caribbean Sea and the tropical coastal waters of western Africa (Allen, 1991). As an Atlantic species, A. saxatilis most probably entered the Mediterranean through the Strait of Gibraltar. Azzurro et al. (2013) mentioned natural range expansion through this gate as a reasonable hypothesis; however, they do not exclude the possibilities of an acquarium escape or ship transport. Schools of damselfish planktivores of the genera Abudefduf and Chromis are known to associate with floating objects (see Dempster et al., 2002; Luiz et al. 2012). The same phenomenon of alien fish, follow­ing debris, plastic objects and other floatsam has also been observed with certain alien fish species, already reported from the Adriatic Sea, e.g. Pampus argenteus (Dulčić et al., 2004). Despite its northermost position, the Gulf of Trieste and the adjacent northern Adriatic Sea witnessed records of other alien fish species. The first such alien species was the silver pomfrey P. argenteus, caught in waters off Rijeka (Fiume) in 1896 (Dulčić et al., 2004), which was also the first ever recorded Lessepsian migrant in the Adriatic Sea, as well. The second case was the capture of an alien grouper Epinephelus coioides, reported by Parenti & Bressi (1998) for the Gulf of Trieste. Later on, some other alien fish species were reported such as Tera-pon theraps in waters off Piran in 2007 (Slovenia) (Lipej et al., 2008), Siganus luridus (Poloniato et al., 2010) at Miramare (Trieste), Stephanolepis diaspros (Bay of Piran) Tab. 1: Non-native damselfish records in the Mediterranean Sea according to the available published data. Tab. 1: Tujerodne vrste rib koralnic v Sredozemskem morju na podlagi razpoložljivih objav. Damselfish species locus state source 1 Abudefduf saxatilis Tarragona Spain Azzurro et al., 2013 Abudefduf saxatilis Candarli Bay Turkey Bilecenoglu, 2016 Abudefduf saxatilis Valetta Malta Vella et al., 2016a Abudefduf saxatilis Valetta Malta Deidun & Castriota, 2014 Abudefduf saxatilis Sdot-Yam Israel Tsadok et al., 2015 Abudefduf saxatilis Trieste Italy this work 2 Abudefduf vaigiensis Gulf of Naples Italy Tardent, 1959 Abudefduf vaigiensis Ligurian Sea Italy Vacchi et al., 2000 Abudefduf vaigiensis Valetta Malta Vella et al., 2016a Abudefduf vaigiensis Lebanese waters Lebanon Bariche et al., 2015 Abudefduf vaigiensis North coast Israel Goren & Galil, 1998 3 Abudefduf sexfasciatus Sounio Greece Giovos et al., 2018 4 Abudefduf hoefleri Southern Malta Malta Vella et al., 2016b 5 Stegastes variabilis Senglea Malta Vella et al., 2015 6 Chrysiptera cyanea Portorož Slovenia Lipej et al., 2014 7 Chrysiptera hemicyanea Manoel Island Malta Deidun et al., 2018 (Lipej et al., 2014b) and Oplegnathus fasciatus (Muggia) (Ciriaco & Lipej, 2016). There is also mentioned refer­ence to a Blue Devil (C. cyanea) in the waters off Piran, which could be most likely considered as an intentional release from an acquarium. One specimen, which was caught by SCUBA divers, was held in the acquarium tank of the Marine Biology Station for many months till it died (Lipej et al., 2014a). It is interesting to mention the fact that some alien species were recorded for the very first time in the northernmost part of the Adriatic Sea as is the case of T. theraps, S. luridus, O. fasciatus and now A. saxatilis. Neither of those species has been recorded again in the Gulf of Trieste, so we should therefore consider them as ‘Casual’ species (sensu Evans et al., 2015). As with all mentioned cases, in the case of A. saxatilis only a single specimen was sighted in the studied area, so it is rather probable that it should be considered as an isolate record. In all cases, specimens were first sighted during the warmer part of the year (e.g. from June to Septem­ber), with rather high sea temperatures. It is possible that the low winter temperatures in the Gulf of Trieste do not allow the settlement or survival of such alien fish species. The same is also true for the tropical alien algae Caulerpa cylindracea. The northernmost record of this species is located in area near the Istrian city of Umag (Sladonja & Banovac-Kuča, 2014); however, to date, it has not been able to reach the adjacent Gulf of Trieste. If possible, it is always better to follow basic ichthyo-logical procedures for publishing first records as this is the best practice approach (sensu Bello et al., 2014); it includes meristics, morphometry or even genetic identification. However, in the case of alien tropical fish species, which are easily detected among the native fish community due to their conspicuous colour pattern, an evidenced record such as photographic material or footage could also be very helpful. They are normally sighted as single specimens and recorded during the warmer part of the year, For example, the first record of S. luridus in the Adriatic Sea was reported from the area of WWF Miramare near Trieste based on photographs and footage recorded in the area (Poloniato et al., 2010). Subsequently, more cases of the same species were reported from the Adriatic Sea by Dulčić et al. (2011, 2013) and Đurović et al. (2014). The same happened with another alien fish species, O. fasciatus (Ciriaco & Lipej, 2016), which was reported for the first time from the Gulf of Trieste, according to a photographed specimen, and later recorded again in Urinj (Rijeka Bay, northern Adriatic Sea) (Dulčić et al., 2016). To date, 444 fish species have been recorded in the Adriatic Sea (Kovačić et al., submitted) with at least one positive record of the species in the area. Thus, with the inclusion of Sergeant major, the checklist of Adriatic fish fauna now includes 445 fish species. Due to the ongoing arrival of alien fish species through the Suez Canal and range extending species from the Atlantic, the number of fish will certainly increase in the near future. ACKNOWLEDGMENTS The authors would like to express their gratitude to Leon L. Zamuda who accompanying us in the search for a Sergeant Major specimen in Strunjan. Special thanks are also due to our colleague, marine photographer Borut Furlan for providing us with photographs of Abudefduf saxatilis and A. vaigiensis, thus offering us the possibility to check the morphological differences between the two species. We would like to express our gratitude to Mrs. Ksenija Kos, who shared her experience with sightings of the Sergeant Major in the Strunjan Marine protected area. PRVI ZAPIS O POJAVLJANJU VELIKEGA SERŽANTA, ABUDEFDUF SAXATILIS (LINNAEUS, 1758) V JADRANSKEM MORJU Lovrenc LIPEJ & Domen TRKOV Marine Biology Station, National Institute of Biology Piran, SI-6330 Piran, Slovenia e-mail: lovrenc.lipej@nib.si Domen STANIČ DOPPS, Tržaška cesta 2, SI-1000 Ljubljana, Slovenia Sara CERNICH Agency for Nature Conservation, SI-6310 Izola, Slovenia Saul CIRIACO WWF Miramare, Strada Costiera 334, Trieste, Italy POVZETEK Primerek velikega seržanta Abudefduf saxatilis (Linnaeus, 1758) so avtorji avgusta in septembra 2019 dalj časa opazovali v plitvinah skalnatega dna pri Tankem rtiču (Punta Sottile, Milje, Tržaški zaliv). Najverjetneje je zašel na skrajni severni del Jadranskega morja skozi gibraltarsko ožino. To je prvi zapis o pojavljanju te vrste v Tržaškem zalivu in tudi Jadranskem morju. 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