pelvic fin 3 rounded or oval, with a well-developed frenum; preopercularcanal porespresent or absent 3a) Top of head naked; second dorsal Microgobius typically I,14-17 3b) Top of head scaled; second dorsal 4 typically 1,11-13, rarely 1,14 4a) Preopercularcanal poresabsent, head Parrella...