Species description

Care, breeding and tankmates

Fish profile

Temperament

Territorial

This species is extremely pugnacious and dominant. They fearlessly attack intruders and can disrupt the peace of an entire aquarium. They must be added last to minimize the territory they claim as their own.

Diet

Omnivore

They are indiscriminate omnivores that greedily consume all standard aquarium fare. Feed them a robust mix of frozen mysis, chopped seafood, and high-quality pellets. Incorporating marine algae ensures their digestive system functions properly.

Sex ratio

Solitary

It is highly recommended to keep only a single specimen in the aquarium. Conspecific aggression is intense and usually results in the death of the weaker fish. Only public-sized aquariums can successfully house a group of mature adults.

Feeding frequency

Twice daily

Offer food two to three times daily to keep them satisfied. Frequent feedings help reduce their aggressive tendencies toward other fish. Ensure that uneaten food is promptly removed by the filtration system.

Bioload

The Night Sergeant generates a moderate bioload that necessitates a robust filtration system. They are messy eaters and produce significant waste. A high-capacity protein skimmer and strict maintenance routine are essential for long-term success.

Flow

Strong

They thrive in areas of strong, turbulent flow. High water movement simulates their natural reef-crest habitat and promotes healthy exercise. Employing multiple wavemakers ensures adequate circulation throughout their environment.

Jump risk

No

Reproduction

Oviparous

They spawn by laying adhesive eggs on rocks which the male vigorously defends. During breeding, their aggression levels peak dramatically. Attempting to rear the larvae in a home aquarium is generally unsuccessful due to specialized needs.

Compatibility & tankmates

Extremely aggressive

They are highly aggressive and should only be kept with tough, large companions. Tangs, triggers, and large puffers make suitable tank mates. Never house them with peaceful or delicate species, as they will be bullied relentlessly.

Tank level

Middle

They dominate the middle to upper water column of the tank. They are highly active, constantly swimming and patrolling their perceived territory. They require plenty of open swimming space alongside their chosen rock caves.