Kingdom: Animalia 
Phylum: Chordata
Class: Actinopterygii (ray-finned fishes) 
Order: Perciformes (Perch-likes) 
Family: Serranidae (Sea basses: groupers and fairy basslets)
Subfamily: Anthiinae (Anthias)
Genus/species   Pseudanthias pleurotaenia    

GENERAL CHARACTERISTICS: Sexually dichromatic. The male is orange-red to magenta, one large violet square on each side of its body (thus the common name), elongate third dorsal spine. Coloration and size of “square” highly variable among individuals; female less colorful. On many individuals, the magenta square spot appears to glow like a neon light.

Length up to 20 cm (8 in)

Square Spot Anthiasis 8724441967_b4f47d1d06_k


DISTRIBUTION/HABITAT: Indonesia to Samoa, north to Ryukyu, Japan and south to New Caledonia and Rowley Shoals in the eastern Indian Ocean.Steep, current-swept seaward drop offs, 10–180 m (33- 600 feet), but typically below 25 m (82 feet) in-depth.

DIET IN THE WILD: Small crustaceans and fish eggs.

REPRODUCTION: Males haremic Like other serranids, basslets are protogynous hermaphrodites; in other words, they are born female, and a few change sex to become dominant males as breeding needs arise. They produce large quantities of eggs and their larvae are planktonic, generally at the mercy of ocean currents until they mature and settle into adult populations.


REMARKS: Usually in small (6–30 individuals) aggregations of conspecifics; females far outnumber males in the groups.  Active diurnally. Nocturnally shelter within the reef.


California Academy of Sciences Steinhart Aquarium Philippine Coral Reef 2016



Monterey Bay Aquarium

Georgia Aquarium…

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