Marbled Goby

Pomatoschistus marmoratus

The Marbled Goby is a small fish species found in the eastern Atlantic, from the Bay of Biscay to the Iberian Peninsula, extending through the Mediterranean Sea, Black Sea, and Sea of Azov, and even into the Suez Canal. It inhabits marine and brackish waters, favoring sandy substrates in shallow areas typically up to 20 meters deep, though it can be found as deep as 70 meters, particularly in the winter months. This goby can grow up to 8 cm in length, but most individuals are around 5 cm. Identifiable by its fusiform body shape, the Marbled Goby has distinct dorsal and anal fin structures, with 7 dorsal spines and 8-10 dorsal soft rays, and a single anal spine accompanied by 7-10 anal soft rays. The species is known for its scaled breast and minute projections on the rear edge of the anterior pelvic membrane. During breeding, males exhibit a unique coloration with four dark bars on their sides, a blue spot on the first dorsal fin, and darkened pelvic and anal fins. The Marbled Goby feeds primarily on small crustaceans and chironomid larvae. Males are responsible for nest preparation and care, cleaning bivalve shells and covering them with sand for egg deposition. They defend the nest and tend to the eggs until they hatch. The species is listed as Least Concern by the IUCN.