1. First Evidence of the Presence of Okenia picoensis Paz-Sedano, Ortigosa & Pola, 2017 (Gastropoda: Nudibranchia) in the Adriatic SeaMarco Fantin, Saul Ciriaco, Lisa Faresi, Chiara Scrigner, Juri Vecchi, Domen Trkov, Lovrenc Lipej, 2023, original scientific article Abstract: The authors report the finding of some specimens (8 sightings) of Okenia picoensis (Gastropoda: Nudibranchia) at three different sites in Croatia (northern Adriatic Sea). Although this seaslug species has only recently been described, this record confirms its rapid spread throughout the Mediterranean Sea. This finding represents the first substantiated record in the Adriatic Sea.
Keywords: Heterobranchia, spreading, northern Adriatic Sea
Published in DiRROS: 10.07.2026; Views: 67; Downloads: 43
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2. First Record of the Marine Heterobranch Spinoaglaja wildpretii (Ortea, Bacallado & Moro, 2003) (Cephalaspidea: Aglajidae) in Sicily (Ionian Sea) with Notes on Its Biology and EcologyAndrea Lombardo, Giuliana Marletta, 2023, original scientific article Abstract: The present note documents the first report of the Aglajidae Spinoaglaja wildpretii along the central-eastern coast of Sicily, a coastal stretch which has been recently examined regarding marine heterobranchia fauna. This rare sea slug was found discontinuously in its distribution range by both enthusiasts and specialists (Canary Islands and Mediterranean Sea) from the time of its description until today. In this short note, all the available biological and ecological information about S. wildpretii is here reviewed and discussed. From resumed and new data about this species, it can be hypothesized that S. wildpretii can be a generalist marine heterobranch species, having been found in very ubiquitous habitats during most of the months of the year and in a large range of temperatures.
Keywords: Head-shield marine slugs, Heterobranchia, Ionian Sea, Philinoidea, sea slugs
Published in DiRROS: 10.07.2026; Views: 49; Downloads: 38
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3. Additional Data on the Bump-Head Sunfish, Mola alexandrini (Ranzani, 1839) in the Adriatic SeaBorut Mavrič, Lovrenc Lipej, Jelena Belamarić, Dule Bulaja, Matea Špik, Petar Kružić, 2023, original scientific article Abstract: On 3 June 2017, a group of divers mapping benthic habitats in a locality south of Dubrovnik, Croatia, spotted and photographed a giant specimen of sunfish accompanied by a school of imperial blackfish (Schedophilus ovalis) at a depth of 40 m. The specimen was identified as a bump-head sunfish Mola alexandrini (Ranzani, 1839). This is one of the few records of this little-known and overlooked species in the Adriatic Sea and one of the few cases in the whole Mediterranean.
Keywords: Mola mola, Mola alexandrini, Adriatic Sea, Schedophilus ovalis
Published in DiRROS: 10.07.2026; Views: 78; Downloads: 43
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4. An Overlooked Finding of Mola alexandrini (Ranzani, 1839) in the Adriatic SeaGianni Insacco, Gildo Gavanelli, Bruno Zava, Maria Corsini-Foka, 2023, original scientific article Abstract: The identity of a large sunfish, stranded in 1999 on a beach of the north-western Adriatic Sea, has been shifted from Mola mola (Linnaeus, 1758) to Mola alexandrini (Ranzani, 1839), considering the recent taxonomic revision of the family Molidae. The faithful fiberglass model of the specimen is displayed at the Museo Civico di Storia Naturale di Comiso, Ragusa, Italy. The record of the species is the second one ascertained in the Adriatic Sea and one of the few records of the Bumphead sunfish documented to date in the Mediterranean Sea.
Keywords: Molidae, Mola mola, Mola alexandrini, Mediterranean Sea
Published in DiRROS: 10.07.2026; Views: 59; Downloads: 35
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5. The Confirmed Occurrence of Schedophilus medusophagus (Cocco, 1839) and Petromyzon marinus Linnaeus, 1758 in Maltese Waters, Central MediterraneaAlan Deidun, Bruno Zava, Alessio Marrone, Johann Galdies, Arnold Sciberras, Maria Corsini-Foka, 2023, original scientific article Abstract: Specimens of two uncommon fish species, Schedophilus medusophagus and Petromyzon marinus, were recently collected in nearshore waters off the island of Malta in the central Mediterranean. Several morphological and biological parameters for the specimens are described. The findings ascertain the occurrence of the two species in the area and corroborate furthermore the substantial contribution to wildlife sightings made through social media and by citizen scientists, thus further increasing knowledge on Mediterranean biodiversity.
Keywords: Centrolophidae, Petromyzontidae, Malta, Mediterranean Sea, citizen science
Published in DiRROS: 10.07.2026; Views: 73; Downloads: 60
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6. Recent Record of the Atlantic Pomfret Brama brama (Bonnaterre, 1788) (Scombriformes: Bramidae) in the Gulf of Trieste (Northern Adriatic Sea)Nicola Bettoso, Diego Borme, 2023, original scientific article Abstract: On 20 June 2023 a specimen of Atlantic pomfret Brama brama (Bonnaterre, 1788) (Bramidae) was caught by trammel net at 5 m depth in the Gulf of Trieste. B. brama is a pelagic neritic oceanodromous species distributed throughout temperate and warm-temperate oceans at depth ranging from 0 to 1,000 m and occasionally coming close to the shore. It is considered a rare species in the eastern Mediterranean and Adriatic Sea. The present record is the most recent in the Gulf of Trieste, after those historical deposited in the Natural History Museum of Trieste.
Keywords: Atlantic pomfret, Brama brama, Gulf of Trieste, northern Adriatic Sea
Published in DiRROS: 10.07.2026; Views: 77; Downloads: 45
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7. The First Record of Complete Albinism in Common Stingray Dasyatis pastinaca (Linnaeus, 1758)Alen Soldo, 2023, original scientific article Abstract: An unusually colored stingray was video-recorded on 15 August 2022 in the eastern central Adriatic. Its morphological characteristics corresponded with the descriptions of the common stingray Dasyatis pastinaca (Linnaeus, 1758), however, the specimen observed was entirely white on the dorsal and ventral surfaces, including the tail, except for the tips of the spines. Furthermore, the iris of the specimen lacked pigmentation and exhibited an abnormal orange-yellow (xanthochromic) coloration. This discovery marks the first recorded instance of complete albinism in this particular species and a rare occurrence among elasmobranchs in general.
Keywords: Dasyatis pastinaca, common stingray, albinism, leucism, Adriatic Sea
Published in DiRROS: 10.07.2026; Views: 74; Downloads: 52
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8. On The Occurrence of Norwegian Skate, Dipturus nidarosiensis (Rajidae) on the Algerian Coast (Southwestern Mediterranean Sea)Farid Hemida, Christian Reynaud, Christian Capapé, 2023, original scientific article Abstract: The authors report the capture of several specimens of the Norwegian skate Dipturus nidarosiensis (Storm, 1881) off the western Algerian coast. These are predominantly large specimens ranging between 141 cm and 164 cm in total length and between 69 cm and 71.5 cm in disc width. It is likely that these specimens originated from the eastern Atlantic and entered the Mediterranean through the Straits of Gibraltar, which would make D. nidarosiensis a Herculean species. The relatively high abundance of captures off the Algerian coast suggests that at present, a viable population may be successfully established in the region.
Keywords: Dipturus nidarosiensis, Rajidae, migration, Straits of Gibraltar, Mediterranean Sea
Published in DiRROS: 10.07.2026; Views: 83; Downloads: 53
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9. A Rare Occurrence and Confirmed Record of Scalloped Ribbonfish Zu cristatus (Osteichthyes: Trachipteridae) in the Gulf of Antalya (Eastern Mediterranean), TurkeyDeniz Ergüden, Sibel Alagoz Ergüden, Deniz Ayas, 2023, original scientific article Abstract: On 25 October 2022, a juvenile specimen of scalloped ribbonfish Zu cristatus was captured in the Finike coast, Gulf of Antalya (Eastern Mediterranean, Turkey) by a commercial trawler at a depth of 50 m. The paper reports the first occurrence and confirms the presence of Z. cristatus in the Antalya Bay. The morphological and colour descriptions of the captured Z. cristatus specimen agree with previous descriptions of the species. This record is the first evidence of a juvenile specimen of Z. cristatus in the Mediterranean coast of Turkey. Additionally, the study documents the historical records of the species in the Mediterranean Sea and can contribute to the field of fisheries science and aid in fisheries management.
Keywords: Trachipteridae, ribbonfish, record, Antalya Gulf, Mediterranean Sea
Published in DiRROS: 09.07.2026; Views: 117; Downloads: 79
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10. The First Marine Record of Northern Pike Esox lucius Linnaeus, 1758 in the Mediterranean SeaAlen Soldo, 2023, original scientific article Abstract: Near the coast of Stobreč, Central Adriatic Sea, a recreational fisher caught a strange fish specimen at a depth of 5 m, using a fishing trident. Upon the arrival of the fisher in the harbor the specimen was taken away for analysis. This revealed that the specimen’s morphological characteristics matched those of the northern pike Esox lucius Linnaeus, 1758. As the northern pike is a stenohaline freshwater fish, it had never been recorded before in the high salinity marine conditions of the Adriatic Sea or anywhere else in the Mediterranean. The collected specimen most likely originated from the nearby short river Žrnovnica. This paper discusses the possibility that the northern pike introduced to some rivers emptying into the Adriatic Sea may possess the local ability to withstand short trips to high salinity waters.
Keywords: Esox lucius, northern pike, salinity tolerance, hypo-osmoregulatory process, Adriatic Sea, area expansion
Published in DiRROS: 09.07.2026; Views: 110; Downloads: 71
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