Black Cap Jawfish (Asia Pacific)
Jawfish are some of the most personable fish available. Their huge eyes miss nothing in the aquarium, and peer through the glass at their keeper. They may then cock their head to the side like a puppy as they interact with their owner. Aggressive tank mates and fish with large mouths should be strictly avoided, as should any animal that may disturb the tranquility of the sand bed: sleeper gobies, pistol shrimp, burrowing wrasses, goatfish, etc may stress the timid jawfish out of its burrow. Unless the aquarium is large jawfish may also stress each other. They use open mouth threats, and when that does not work they grab mouthfuls of sand and dump it in the other fish's burrow. Suitable tank mates include non sand-dwelling gobies, peaceful blennies, cardinal fish, clownfish, flasher wrasses, chromis, dragonets, assessors, etc. They may consume tiny fish such as Trimma or Evotia gobies, and shrimp such as sexy shrimp. Because of its extremely shy demeanor, we recommend the jawfish be the first fish added to the aquarium.
Jawfish are sand dwelling animals and use their large mouths to scoop out a burrow to live in. At nighttime or when a tunnel is not being used the fish may block it off with shells and small rocks. It is important to provide deep sand of at least four inches, preferably deeper, with plenty of shells and crushed coral of various sizes so the fish has enough building material to create a stable dwelling. The shed leaves of Halimeda algae are also utilized as building material. Rocks should be placed on the aquarium glass and sand poured around them to eliminate the danger of a cave-in when the fish excavates. Plenty of open swimming space may encourage the jawfish to hover higher above its burrow. We recommend the tank be securely covered as jawfish are prone to jumping from open top aquaria.
Jawfish are primarily carnivores and their diet should include plenty of high quality meaty items, marine algae, Spirulina, and frozen Mysis shrimp. It is preferable to feed two to three times a day and to let some food land on the bottom of the aquarium. Frozen food is best, however in time they may learn to eat dry foods.
The Black Cap jawfish has bold colorful markings and an inquisitive nature. It wears a black mask over its face, and its creamy colored body is marked by rusty orange stripes. Its rear fins are a bright lemon yellow, and a small black spot is present at the front of its dorsal fin. Males and females are identical. It grows to 4 inches and should be kept in an established aquarium of at least 30 gallons.
