Common name: spotfin jawfish

General information

The Banded Jawfish, Opistognathus macrognathus, is a captivating and unique species known for its burrowing behavior and expressive face. The name 'jawfish' comes from their large mouths, which they use to excavate and maintain their burrows in sandy substrates. They are often seen with only their heads poking out, vigilantly observing their surroundings.

These fish are not only admired for their interesting behavior but also for their striking appearance, with alternating bands of blue and yellow across their bodies. The 'moustache' part of one of their common names refers to the distinctive markings around their mouth.

Care

Jawfish are generally hardy and can be a good choice for intermediate to advanced aquarists. They require a tank with a thick sand bed for burrowing and a peaceful tank environment, as they can be shy and easily outcompeted for food by more aggressive fish. A varied diet of meaty foods, such as brine shrimp, mysis shrimp, and finely chopped seafood, will help maintain their health and coloration.

Reproduction

Banded Jawfish are mouthbrooders, meaning the males carry the fertilized eggs in their mouths until they hatch. This fascinating behavior can occasionally be observed in the home aquarium if a pair is well-established and the environment is stable.

Habitat

Native to the Western Atlantic, including the Gulf of Mexico and the Caribbean, Opistognathus macrognathus is typically found in sandy areas adjacent to reefs. They create burrows at depths ranging from shallow waters to about 40 meters deep.

In the aquarium, replicating their natural habitat with plenty of sand and some rockwork for additional structure will provide them with the environment they need to exhibit natural behaviors.