Violet goby "Columnaris" and fin rot; which are bacterial infections that spread across the skin and fins of the fish. They are usually treated with antibacterial or antibiotic medications. Violet goby The violet goby ("Gobioides broussonnetii") is a species of goby native to marine, fresh and brackish waters near the Atlantic coast of North and South America from South Carolina in the United States of America, to northern Brazil. It prefers bays, estuaries and river mouths with muddy substrates. It is often marketed as the dragon goby or dragon fish. The Violet goby has a long, slender, eel-like body. Its dorsal and
Pinchuk's goby Pinchuk's goby Pinchuk's goby ("Ponticola cephalargoides") is a species of goby native to the Black Sea and the Sea of Azov. The body of adults is prolonged, not very high. Only juveniles have high and short body. Сaudal peduncle is very high (highest between al representatives of genus "Ponticola"), short and flattened from sides (its high is equal its length). The scales on the caudal peduncle are not very big. Head is flattened from sides, snout profile is round, cheeks are round. Superior lip is broad, relatively short. Premaxilla short (especially in juveniles), with sparse strong lips. First dorsal fin