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
Bucchich's goby Bucchich's goby Bucchich's goby ("Gobius bucchichi") is a species of goby native to the Eastern Mediterranean Sea and perhaps the Black Sea. It has traditionally been considered to be more widespread, but in 2016 the similar incognito goby ("G. incognitus") was described. It had been confused with the Bucchich's goby and much information formerly published for this species is now considered to actually be for the incognito goby. The Bucchich's goby prefers coastal waters with a sandy or muddy substrate with seagrass patches or tide pools at depths of from . Its diet consists of polychaete worms, amphipods, molluscs and