Jawfish, Black Cap

lg 81986 Black Cap Jawfish
Latin name: (Opistognathus randalli)

Care Level





Black, Green, Orange, Tan



Preferred Conditions


Avg. Max Size


Minimum Tank Size

30 gallons



This species should be housed in a spacious 30-gallon or larger aquarium with a secure lid. This is to ensure that no harm comes to the animal by way of it jumping out. Additionally, a minimum of 3 inches of mixed substrate should be provided to allow the animal to burrow. It is important to note that this species is known to be a potential predator of small shrimp, so if they are to be housed together, extreme caution should be exercised. Additionally, if the species is housed with other tank mates, it should be provided with enough space and hiding spots to coexist peacefully.

The Black Cap Jawfish is an excellent choice for any saltwater aquarium, as it is hardy and will spawn successfully in captivity. This species of fish is also easy to feed, requiring only small pieces of meaty foods such as brine or mysis shrimp. It is important to provide plenty of open sand in the aquarium for the female to construct her burrow and spawn. With proper care, the Black Cap Jawfish can be a long-term inhabitant of your aquarium. They are peaceful, hardy, and interesting to watch, making them a great choice for any aquarium.

The diet should consist of a variety of marine fish, crustacean flesh, and mysis shrimp. It prefers to be fed at least three times per day. This will ensure that your fish is getting the nutrients it needs to stay healthy and thrive.

Gill's Fish