Species description

Care, breeding and tankmates

Fish profile

Temperament

Aggressive

They are fiercely territorial and will ruthlessly bully much larger fish that enter their domain. They are often referred to as terrors due to their outsized aggression. Despite their bad attitude, their stunning sapphire color makes them a popular choice.

Diet

Omnivore

They are hardy omnivores that will accept almost any food offered. A base diet of high-quality marine flakes or small pellets is perfect. Supplement with frozen mysis shrimp and algae to ensure balanced nutrition and bright colors.

Sex ratio

Solitary

Keeping them singly is usually the safest route due to their extreme conspecific aggression. If breeding is desired, introduce a male and female simultaneously into a large tank. Males typically possess bright orange tails, while females remain entirely blue.

Feeding frequency

TWO_THREE_DAILY

Feed them small portions two to three times a day. Their high metabolism demands frequent energy intake to fuel their constant swimming. They are aggressive eaters that will quickly dominate the feeding zone.

Bioload

This highly active but small fish produces a relatively low bioload. Standard protein skimming and biological filtration are adequate for their care. Regular water changes are still needed to maintain pristine reef conditions.

Flow

Strong

They appreciate moderate to strong water flow simulating a vibrant reef environment. Active water movement provides them with endless swimming exercises. It also helps transport oxygen and flush detritus from their rocky territories.

Jump risk

No

Reproduction

Oviparous

They frequently spawn in home aquariums if a compatible pair is formed. The male clears a nesting site on a rock and vigorously guards the deposited eggs. Rearing the microscopic fry is exceptionally difficult and rarely accomplished by hobbyists.

Compatibility & tankmates

Reef safe

They are notoriously aggressive and territorial for their diminutive size. They should only be kept with larger, robust fish like tangs or large angelfish. Do not house them with timid species like firefish or peaceful gobies.

Tank level

Middle/Bottom

They are highly active and will boldly patrol all levels of the aquarium. They claim specific caves in the rockwork as their absolute territory. They will frequently dart out from their caves to challenge any passing fish.