Pygmy jawfish
The pygmy jawfish ("Anoptoplacus pygmaeus") is a species of ray-finned fish from the family Opistognathidae, the jawfishes. It is the only member of the monospecific genus "Anoptoplacus" and the species and genus were described based on two specimens collected at depths of at the Arrowsmith Bank off Yucatan, Mexico. As the name suggests, the pygmy jawfish is a very small species and many of its meristic characters are reduced compared to other jawfishes.