Twospot Goby

Found singly, or in small schools, over rubble and sandy bottoms, with depressions and holes in the floor, close to their burrows, in clear seaward reefs.

These Gobies feed by taking a mouthful of sand that is filtered through the gills for tiny creatures.
They make large homes on sandy areas below rocks, with a small entrance that is covered over at night, when predators are near these Gobies dive into the sand and swim through the sand to escape danger.