They are commonly referred to as pygmy angelfishes, due to their generally much smaller size than other angelfish genera. The species are variably distributed in tropical and subtropical seas of the world. Few have large geographical distributions and some are endemic to tiny oceanic outposts, an island , or small island group. They occur on algal-rocky and coral reefs, and most species live in shallow waters at depths to about 15m, but some range to 70m or more, and a few inhabit only depths of more than 50m. Pygmy angelfishes are quick-darting and often shy species that hug the substrates with tunnels and crevices, ready to disappear and appear again several metres away.
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Place of origin:Western Pacific
North-western Pacific, southern Japan, Taiwan, the Philippines and Palau. Found mainly on outer reef slopes or drop-offs to at least 40m depth. Not so much on coral reefs and usually inhabits caves or holes of steep walls where it typically swims upside down. Adults are mostly blue with yellow bellow, from snout to anal fin, and in the young, a yellow band extends behind the head. Fairly commonly seen in certain areas of the Tokaras, north of Amami-ohshima, Kagoshima Prefecture, and in the Izu Islands.In Palau it is rare. Seen solitary, in pairs and occasionally in small groups of up tho three or four individuals. Length to 12cm.