The occurrence and feeding of a critically endangered shark species, Oxynotus centrina in the Sea of Marmara.

The angular roughshark, Oxynotus centrina (Linnaeus, 1758), is a rarely encountered deep-sea demersal shark species. It is listed as "Critically Endangered" in the IUCN's regional assessment for the Mediterranean. Like other sharks and rays, the angular roughshark is subject to by-catch in demersal trawl and longline fisheries.

Current status (as of end of 2020) of marine alien species in Turkey.

The 2020's update of marine alien species list from Turkey yielded a total of 539 species belonging to 18 taxonomic groups, 404 of which have become established in the region and 135 species are casual. A total of 185 new alien species have been added to the list since the previous update of 2011. The present compilation includes reports of an ascidian species (Rhodosoma turcicum) new to the marine fauna of Turkey and range extensions of six species.

Distribution and population structure of the alien Indo-Pacific Randall's threadfin bream Nemipterus randalli in the eastern Mediterranean Sea.

As part of a comprehensive study of trawl fishery catch off Israel (Ashdod) and Turkey (Iskenderun and Antalya) conducted during 2008-2011, the population explosion of Nemipterus randalli, first recorded in the Mediterranean Sea in the beginning of 2005, was documented. The smallest individuals occurred on deeper bottoms (120 m), significantly more individuals were collected at night, and juvenile recruitment to the commercial fishery occurred during November and December at 40 m depth.

Biology of a new xenoma-forming gonadotropic microsporidium in the invasive blotchfin dragonet Callionymus filamentosus.

A gonadotropic microsporidian parasite, Obruspora papernae gen. et sp. nov.

Dasyatispora levantinae gen. et sp. nov., a new microsporidian parasite from the common stingray Dasyatis pastinaca in the eastern Mediterranean.

A new microsporidian infecting the Mediterranean common stingray Dasyatis pastinaca (Linnaeus, 1758) is described from Iskenderun Bay, Turkey. The parasite invades the disc muscles, producing slender, spindle-shaped subcutaneous swellings that develop into massive, elongated, tumor-like protuberances measuring up to 11 x 4 cm. Severity of the infection may vary from light (1 or 2 small lesions) to intense, with large parts of the dorsal surface covered with lumps and protrusions.