Gobius tetrophthalmus

"Gobius tetrophthalmus" is a species of marine fish from the family Gobiidae, the true gobies. It occurs in the Atlantic Ocean around Cape Verde, western Africa, where it is found at depths from 7 to 25 metres. It prefers areas with coralline algae though it will also inhabit areas with substrates of sand and rock. This species can reach a length of 7.8 centimetres TL. It is harmless to humans.