Very special thanks for the first photo of Gobiodon atrangulatus to Massimiliano Petricca from Italy.
The mongamous goby lives commensal with Acropora spp. in coral reefs in Japan and Fiji.
Depth range: about 4 meters.
The gobies lay their eggs on individual branches of coral of stone, to do this they bite off the polyps at the lower base of coral branches, after the hatching of the young fish the coral reproduces soon new polyps at the base.
Once in the tank, the harmless goby may be very difficult to get out of the tank.