Fat Sleeper (Dormitator maculatus)

Description: 

The Fat Sleeper is a widespread Atlantic and Gulf coastal species that is found from North Carolina to Brazil. They are found in brackish and freshwater ponds and backwaters. It is unknown why this family, Eleotridae, earned the common name “sleeper.” Although their appearance resembles that of a darter, they can be distinguished by having a head that is fully covered in scales.