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On February 27, 2018, a female smoothback angelshark, Squatina oculata, was incidentally captured in a gill-net fishery off the Mudanya coast (southeastern Sea of Marmara). An opportunistic photographic record confirmed the emergence of S. oculata in the Sea of Marmara, where its status in the area is considered questionable because of its absence for many years in the region. The current opportunistic records are valuable data sources, which can provide complementary information to fill the knowledge gaps in the life histories of rare, rarely caught, or endangered sharks and rays. [ABSTRACT FROM AUTHOR]

Abnormalities of shape, color or body deformities such as lack of swim bladders or any parts of the body are an unexplained issue for many fish species. There is a gap of knowledge regarding their causes. Generally, it is an important problem in the rearing technique in aquaculture management due to the high economic consequences. The morphological abnormalities occur in marine fishes as well. Missing dorsal spines or rays, scale disorientation, jaw deformities, eye deformations and the lack of some parts of the body are within the context of abnormality. In the present study, the body abnormality observed in a specimen of European hake (Merluccius merluccius Linnaeus, 1758) missing its right eye which was caught by a fisherman in the Marmara Sea on 13 October 2020, and its causes are reported and discussed. Further studies are needed to correlate the wild fish anomalies caused by pollution. [ABSTRACT FROM AUTHOR]

This manuscript reports on four new jellyfish species in the Sea of Marmara (Turkey) (the scyphozoans Mawia benovici and Drymonema dalmatinum, hydrozoan Aequorea forskalea, and thaliacean Salpa maxima) based on plankton collections made in the years 2019-2021. This is the first record of Mawia benovici in both Turkish coastal areas and the Sea of Marmara. The jellyfish that was previously recorded as Drymonema sp. in the repetition Sea of Marmara was identified at the species level as D. dalmatinum. Furthermore, their possible introduction pathways are briefly discussed here. [ABSTRACT FROM AUTHOR]