30 relatively unknown fish species make up the family Psychrolutidae. The most famous of the group, Psychrolutes marcidus, happens to be the aptly named Blob Fish. At the depths these fish inhabit off the Australian and Tasmanian coasts, water pressure is immense. The Blob Fish has solved this problem by ditching the gas bladder most fish utilize for buoyancy control...instead the whole body has become a gelatinous mass just slightly less dense than water. The Blob Fish is one lazy species; it almost completely lacks muscle definition, and lives by floating just above the sea floor, gobbling up morsel passers by. The Blob Fish could be more exciting than we know...its close yet not as ugly relative Psychrolutes phrictus apparently breeds in aggregations on the sea floor, where individuals guard their nests of up to 100,000 (or more!) eggs.