Tompot blenny inquisitive and are often seen by scuba divers. Tompots are usually a deep brown/orange, and are distinguished by a pair of lappets (tentacles) above the eyes and seven or more darker stripes along the body. It feeds on sea anemones or crustaceans. As most fish, tompots harbour several species of parasites, including the capillariid Nematode "Pseudocapillaria bainae". This parasite has been found in the intestine of specimens caught off Italy and Montenegro. Its biology is unknown. Tompot blenny The tompot blenny ("Parablennius gattorugine") is a medium-sized blenny growing to about , part of the large family of blennies that live
Round goby Nord-Ostsee (Kiel) Canal. As of 2010, the westernmost site of round goby occurrence in Europe was the Lower River Scheldt, the tidal zone in the river mouth, and Albert Canal, Belgium. In 2011, the round goby began invading the fresh waters of France: the species appeared in the Rhine River (on the border between France and Germany), and in the French part of the Moselle River. In total, 52 parasite species are registered in the round goby in the native area. Most abundant parasites of the Black-Sea round goby are metacercariae of trematodes of Heterophyidae family, such as "Cryptocotyle concavum",