Species description

Care, breeding and tankmates

Fish profile

Temperament

Semi-aggressive

Despite its fearsome appearance, it actually possesses a surprisingly shy and easily intimidated temperament. It is frequently outcompeted for food by aggressive tank mates and requires a very tranquil environment. Once successfully established, it becomes a fascinating and graceful observer of the aquarium.

Diet

Omnivore

This species can be notoriously difficult to feed and often requires live food, such as ghost shrimp or small fish, to trigger a feeding response. Once acclimated, they can be slowly transitioned to frozen silversides or strips of raw fish. Patience and persistence are absolutely necessary when weaning them onto frozen diets.

Sex ratio

Pair

This species is a protandrous hermaphrodite, radically changing its striking coloration as it matures from juvenile to male, and eventually to female. They are best kept alone, as their behavior toward conspecifics in a confined tank is often completely unpredictable. Forced pairing attempts frequently result in severe injury to the weaker individual.

Feeding frequency

Twice daily

They generally do best when offered food two to three times per week, depending on meal size. Frequent small feedings can sometimes be used to transition them onto frozen foods. Once established, regular but infrequent large meals will keep them perfectly healthy.

Bioload

The bioload for this species is moderately high, requiring a well-established filtration system. Oversized protein skimmers and frequent mechanical filter cleaning are recommended. Regular and substantial water changes are crucial to keep the water parameters completely stable.

Flow

Stagnant

A moderate, varied water flow perfectly simulates its natural reef environment. The flow should be strong enough to keep detritus suspended, but not so strong that the fish struggles to swim. Random, alternating currents are particularly appreciated.

Reproduction

Oviparous

Reproduction in this species involves the release of massive amounts of gametes into the pelagic zone. Their complex lifecycle involves an extended leptocephalus larval stage that drifts in the ocean for months. Because of this monumental biological hurdle, captive breeding has never been successfully documented.

Compatibility & tankmates

Generally peaceful towards medium and large tank mates, it primarily poses a threat to very small fish. It works well in a specialized predator tank or a community of peaceful, larger species. Despite its predatory nature, it is quite shy and easily intimidated by overly aggressive companions.

Tank level

Bottom

It requires a deep, fine sandy substrate where it can burrow securely and create stable homes. It typically remains anchored in its burrow at the bottom of the tank, extending its body outwards to catch passing food. Without a proper sandbed and PVC pipes for structural support, it will become chronically stressed.