Species description

Care, breeding and tankmates

Fish profile

Temperament

Aggressive

As a large and bold predator, it is highly territorial and will aggressively protect its dominant perching positions. Smaller or similarly shaped fish will face immediate and severe hostility upon introduction. Its confident, watchful temperament makes it an incredible display fish for appropriate predator tanks.

Diet

Carnivore

In the wild, it feeds extensively on small benthic crustaceans and invertebrates. The aquarium diet should rely heavily on frozen mysis, krill, and enriched brine shrimp. It may eventually accept high-quality marine carnivore pellets with time and patience.

Sex ratio

Solitary

They are protogynous hermaphrodites, meaning all individuals are born female and the most dominant will eventually transition into a male. In a spacious aquarium, they can be kept in a harem consisting of one male and several females. Adding two males to the same tank will inevitably result in lethal territorial disputes.

Feeding frequency

Twice daily

Feeding one to two times per day is ideal for maintaining the health of this fish. Care must be taken not to overfeed, as uneaten food will quickly degrade the water quality. Small portions consumed completely within a few minutes are best.

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

Strong

This species thrives in moderate to high water flow, which reflects its energetic nature. Strong currents help oxygenate the water and deliver food particles directly to them. Wavemakers and gyre pumps are highly recommended to replicate natural surge zones.

Jump risk

Yes

Lacking a true swim bladder, this fish often darts upwards rapidly when alarmed or chasing prey. This explosive upward movement frequently results in the fish launching directly out of the water. A completely secure canopy or screen top is strictly required to prevent their loss.

Reproduction

Oviparous

Following a complex courtship display, they release their eggs and sperm directly into the open water column. These pelagic eggs drift freely with the currents until they eventually hatch into tiny larvae. Captive breeding is practically impossible due to the specialized requirements of their planktonic larval stage.

Compatibility & tankmates

Community

This species is notoriously aggressive towards smaller fish and will eat ornamental shrimp. Careful selection of tank mates is required, favoring robust species that inhabit different areas of the tank. Snails and hermit crabs are generally ignored, but small delicate invertebrates are at high risk.

Tank level

Middle

Lacking a swim bladder, this fish prefers to rest directly on the substrate, rocks, or coral branches. It spends the vast majority of its time stationary, actively observing its surroundings. It only leaves its perch to execute lightning-fast strikes on passing food or prey.