A cryptic species seldom observed by divers, but are collected with ichthyocides, dredges and sleds. Its collection data suggests that it frequents 10-40 m depth zone, in association with beds of a calcareous algae, Halimeda or calcareous rubble, sometimes mixed with the pocilloporid coral Seriatopora hystrix .
Dorsal spines (total): 8 - 9; Dorsal soft rays (total): 9; Anal spines: 2; Anal soft rays: 8; Vertebrae: 24. This species is distinguished by the following characters: 7 visible first-dorsal spines, the 8th spine hidden by skin; darkish circular spot on the opercle, below opercular spine within a pale area; color in life, uniformly reddish to brownish body, all fins pale; pectoral rays 13-14; predorsal scales 5; eye diameter 10-12% of SL; pectoral fin 25-31% of SL; body depth 37-40% of SL .: short and / or deep; Cross section: compressed.
Behavioural data for Circular cardinalfish is currently being reviewed.
Marine; reef-associated; depth range 8 - 40 m . Tropical West Pacific: Ryukyu Islands, Australia, Indonesia, the Philippines, and Fiji.
The following diseases are known to affect Circular cardinalfish.
No observations yet - be the first to log one!
View all observations for Circular cardinalfish ↗Spotted incorrect or outdated data? Submit a correction and our editorial team will review it. Approved edits go live within 48 hours.
Found a factual error, broken data, or inappropriate content? Let us know and we will investigate promptly.