I have collected this fishes from Visakhapatnam fishing harbour. I think three species in Gobids and other one is very difficult for identification. Can anybody identify this fishes.
In my opinion, only second fish species belongs to Gobiidae (and may be fourth fish also). Second fish may be Parachaeturichthys polynema with typical black spot on the caudal fin (compare to http://www.fishbase.ca/photos/thumbnailssummary.php?Genus=Parachaeturichthys&Species=polynema# ).
First fish looks like juvenile Serranidae. Are there any spinous rays in the first dorsal fin? Third fish is undoubtedly a threadfin (Polynemidae). Is it juvenile Leptomelanosoma indicum - ???