Scientific name: Opistognathus aurifrons
Scientific classification: Animalia, Chordata, Actinopterygli, Perciformes, Opistognathidae, Opistognathus
These fish are given their name due to the yellow colour to the top of their pearlescent blue body. The Yellowhead Jawfish is found most often in sand or coral rubble where they can create burrows that they will retreat into to avoid predation. These fish make the burrows themselves by removing particles and small pebbles to create their home. They can be wary of divers if approached too quickly, but if you stay a few feet away and remain still they will hover above their burrow. The Yellowhead Jawfish retreats into the burrow tail first when intimidated by divers or predators, this allows them to still see their surroundings so they can feed on planktonic matter and small crustaceans that may be passing by. These fish are forced to continually dig out their burrows and can be seen with mouthfuls of sand as they remove debris from their homes. They are found at depths from 3m to 40m (10-130ft) and can grow to be 10cm (4in.) long. The male Jawfish incubates the eggs in its mouth until they are ready to hatch, this takes 7-10 days. The Spanish name for jaw fishes is 'bocas grandees' which literally translates to 'big mouths'!