Round goby includes mollusks, crustaceans, worms, fish eggs, zebra mussels, small fish, and insect larvae. Adult round gobies feed mainly on mollusks and other small invertebrates (insects and amphipods) living on the bottom of lakes and streams. At spring, the main items in its diet in the Sasyk Lagoon are "Hydrobia", "Cerastoderma", "Abra". In the same season near the Romanian coasts of the Black Sea the round goby feeds on polychaetes, crustaceans ("Idotea balthica", "Pachygrapsus marmoratus", "Xantho poressa", etc.) and juvenile gobies. Near Sevastopol the round goby feeds on molluscs ("Mytilaster lineatus", "Abra" spp.), but near Karadag except molluscs ("Cerastoderma", "Brachiodontes") were
Slow goby elongated and somewhat compressed. Its large head is flattened with swollen cheeks and a large mouth. It has a pore between its eyes, and two small pores on its preopercle. Its tail fin is long and rounded without scaes or a lateral line. The slow goby inhabits rocky crevices in tide pools and under cobble in shallow water. The larvae are usually found around sargassum. It needs a temperature of 20.8-23.8 degrees Celsius (69.4-74.8 degrees Fahrenheit). Adults are benthic. Slow goby The Slow goby (Aruma histrio) is a species of goby endemic to the Gulf of California on the west