Mated pair of Twinspot Signal Gobies

A mated pair of Twinspot Signal Gobies, aka Crabeye Gobies, feed by scooping up mouthfuls of sand, sifting out tiny invertebrates, and expelling the sand from its gills. The twin eyespots create the impression of a crab scuttling sideways, causing predators to pause, as the goby’s mottled coloration obscures its body dramatically when set against the natural substrate.
 
Scientific Name:  Signigobius biocellatus