The bluespotted jawfish is well-named, because its mouth is an all-purpose tool. Very, very large compared to the rest of its body, its mouth is of course used for eating, but also to scoop up sand, coral rubble, and broken shells to make a hole, or burrow, to live in. The bluespotted jawfish also uses its mouth to raise its kids: the males hold the eggs in their mouth until they hatch.