Common name: Red blotched perchlet

Scientific name: Plectranthias inermis Randall, 1980

General information

The Geometric Pygmy Hawkfish, scientifically known as Plectranthias inermis, is a small and colorful marine fish that is a popular choice among reef aquarium enthusiasts. This species is known for its unique geometric patterns and vibrant hues, which can add a splash of color and activity to any tank. Despite its common name, it is not a true hawkfish but belongs to the Plectranthiidae family.

Details

Recommended minimum tank volume
75 liter (20 gallons)
Salinity
S.G. 1.022 to 1.025
Temperature
22 to 26 °C (72 to 79 °F)
Acidity
pH 8.1 to 8.4
Average size
9 cm (3½″)
Care level
Moderate to easy Prefers rockwork with hiding spots
Diet
Carnivore Enjoys mysis, brine shrimp
Social
Solo Can be territorial with conspecifics
Reefsafe
Yes
Aggression
Semi aggresive May nip at small fish or inverts
Captive bred
No
Conservation statusSource: IUCN Red List
ExtinctThreatenedLeastConcern

Taxonomy

  1. Kingdom
    Animals
    Animalia
  2. Phylum
    Chordates
    Chordata
  3. Class
    Ray-finned Fishes
    Actinopterygii
  4. Order
    Perch-like Fishes
    Perciformes
  5. Family
    Groupers
    Serranidae
  6. Genus
    Plectranthias
    Plectranthias
  7. Species
    Red blotched perchlet
    Plectranthias inermis Randall, 1980

Care

Plectranthias inermis is a hardy species that adapts well to life in captivity. It requires a well-established aquarium with plenty of live rock for hiding and hunting. This fish is a carnivore and thrives on a diet of small meaty foods such as mysis shrimp, brine shrimp, and finely chopped seafood. It is important to maintain high water quality and stable parameters to keep this fish healthy.

Reproduction

In the wild, Plectranthias inermis is known to spawn in small groups, with males displaying to attract females. In the aquarium, breeding is rare, but with the right conditions and a mature pair, spawning may occur. The eggs are pelagic, meaning they float in the water column until hatching.

Habitat

The Geometric Pygmy Hawkfish is found in the Indo-Pacific region, typically in coral-rich areas and on reef slopes. They prefer depths ranging from shallow waters to about 90 meters. In the aquarium, they do not require a large space, making them suitable for smaller reef tanks as well.