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In this Collective Article on alien and cryptogenic diversity in the Mediterranean Sea we report a total of 19 species belonging to nine Phyla and coming from nine countries. Several of these records concern fish species, and of particular interest are the first records of: Terapon puta for Italian waters; Pteragopus trispilus from Malta; Plotosus lineatus from Cyprus; and the northernmost Mediterranean record of Lagocephalus sceleratus. The northernmost Mediterranean record was also reported for the sea urchin Diadema setosum. The portunid crab Thalamita poissonii was recorded for the first time in Libya. The copepod Pseudodiaptomus marinus was recorded for the first time in the Marmara Sea. The polychaete Branchiomma luctuosum was recorded for the first time from the Mediterranean coast of France. The alien anemone Diadumene lineata was recorded for the first time from Slovenia. The macroalgae Sargassum furcatum was recorded for the first time from Italy. The new Mediterranean records here reported help tracing abundance and distribution of alien and cryptic species in the Mediterranean Sea.

In this Collective Article on alien and cryptogenic diversity in the Mediterranean Sea we report a total of 19 species belonging to nine Phyla and coming from nine countries. Several of these records concern fish species, and of particular interest are the first records of: Terapon puta for Italian waters; Pteragopus trispilus from Malta; Plotosus lineatus from Cyprus; and the northernmost Mediterranean record of Lagocephalus sceleratus. The northernmost Mediterranean record was also reported for the sea urchin Diadema setosum. The portunid crab Thalamita poissonii was recorded for the first time in Libya. The copepod Pseudodiaptomus marinus was recorded for the first time in the Marmara Sea. The polychaete Branchiomma luctuosum was recorded for the first time from the Mediterranean coast of France. The alien anemone Diadumene lineata was recorded for the first time from Slovenia. The macroalgae Sargassum furcatum was recorded for the first time from Italy. The new Mediterranean records here reported help tracing abundance and distribution of alien and cryptic species in the Mediterranean Sea.

This Collective Article presents information on 17 taxa belonging to five (5) Phyla and extending from the Alboran Sea to the Levantine Sea. These new records were found in six (6) different ecoregions as follows: Alboran Sea: Second and easternmost record of the sponge Chalinula nigra in the Mediterranean Sea; Western Mediterranean: first record of the rare gobid Gobius couchi for Spain, based on both morphological and molecular data; new records for the rare ascidian Ciona edwardsi from the Marine Protected Area of Tavolara, Sardinia; several records for four (4) different species of black coral, Antipathella subpinnata, Antipathes dichotoma, Leiopathes glaberrima and Parantipathes larix from the Aeolian Archipelago, all of which are currently threatened and/or protected at a Mediterranean level; the first documented records of the sea lamprey Petromyzon marinus in Calabria, which is considered “Critically Endangered” in Italy; first record in the Tyrrhenian Sea and second record in the Ionian Sea for the crab Ocypode cursor, which seems to be rapidly expanding its distribution range across Italian waters; Adriatic Sea: Additional records of yellowmouth barracuda, Sphyraena viridensis, in the northern Adriatic, which seems to be experimenting a meridionalization process in the region; Aegean Sea: First confirmed record of the iconic gastropod Bursa scrobilator scrobilator in the eastern Mediterranean Sea; an additional record for the vulnerable shark Dalatias licha, also being the largest individual caught in eastern Mediterranean waters till the time of capture; an additional record for the rare crab Distolambrus maltzami, sug gesting the species might be more morphologically variable than originally thought; first documented record for the myctophid Hygophum hygomii in both Turkish waters and the north Aegean Sea; additional records for the tuna Katsuwonus pelamis and the sunfish Ranzania laevis in the eastern Mediterranean, pointing out that both species might

This Collective Article presents information on 17 taxa belonging to five (5) Phyla and extending from the Alboran Sea to the Levantine Sea. These new records were found in six (6) different ecoregions as follows: Alboran Sea: Second and easternmost record of the sponge Chalinula nigra in the Mediterranean Sea; Western Mediterranean: first record of the rare gobid Gobius couchi for Spain, based on both morphological and molecular data; new records for the rare ascidian Ciona edwardsi from the Marine Protected Area of Tavolara, Sardinia; several records for four (4) different species of black coral, Antipathella subpinnata, Antipathes dichotoma, Leiopathes glaberrima and Parantipathes larix from the Aeolian Archipelago, all of which are currently threatened and/or protected at a Mediterranean level; the first documented records of the sea lamprey Petromyzon marinus in Calabria, which is considered “Critically Endangered” in Italy; first record in the Tyrrhenian Sea and second record in the Ionian Sea for the crab Ocypode cursor, which seems to be rapidly expanding its distribution range across Italian waters; Adriatic Sea: Additional records of yellowmouth barracuda, Sphyraena viridensis, in the northern Adriatic, which seems to be experimenting a meridionalization process in the region; Aegean Sea: First confirmed record of the iconic gastropod Bursa scrobilator scrobilator in the eastern Mediterranean Sea; an additional record for the vulnerable shark Dalatias licha, also being the largest individual caught in eastern Mediterranean waters till the time of capture; an additional record for the rare crab Distolambrus maltzami, suggesting the species might be more morphologically variable than originally thought; first documented record for the myctophid Hygophum hygomii in both Turkish waters and the north Aegean Sea; additional records for the tuna Katsuwonus pelamis and the sunfish Ranzania laevis in the eastern Mediterranean, pointing out that both species might n

Samples of the isopod Natatolana neglecta (Hansen, 1890) are reported herein from Güllük Bay, south-eastern Aegean Sea. In the last decade, the abundance of this species has been increasing in the area, and this has led to attacks on fishes captured with gillnets, at night. The small-scale fishermen now are forced to restrict their catch to a short period daily, and are showing concerns regarding the continuation of their fishing practice. Here, we present the first report on the occurrence of N. neglecta in the Bay of Güllük, and provide information on the threat of this species for coastal fishermen in the south-eastern Aegean Sea.

Samples of the isopod Natatolana neglecta (Hansen, 1890) are reported herein from Güllük Bay, south-eastern Aegean Sea. In the last decade, the abundance of this species has been increasing in the area, and this has led to attacks on fishes captured with gillnets, at night. The small-scale fishermen now are forced to restrict their catch to a short period daily, and are showing concerns regarding the continuation of their fishing practice. Here, we present the first report on the occurrence of N. neglecta in the Bay of Güllük, and provide information on the threat of this species for coastal fishermen in the south-eastern Aegean Sea.