Occurs in exposed coral reef slopes and generally encountered solitarily or in pairs at depths of about 10-25 m. It exhibits highly effective camouflage with regards to its shape and colour, closely matching an unidentified, short tubular sponge among which this fish is invariably found .
Dorsal soft rays (total): 18 - 19; Anal soft rays: 4. This species is distinguished by the following characters: pectoral fin-rays 10-11; dorsal-fin rays 18-19; body rings 15-16 + 13 or total 46-47; snout length 2.8-3.2 in HL; lateral trunk ridge ending on penultimate trunk ring; absence of spine-like projections on principle tail ridges; when alive, colour generally pinkish red .: elongated; Cross section: angular.
Behavioural data for Festucalex Rufus is currently being reviewed.
Marine; reef-associated; depth range 10 - 25 m . Tropical
The following diseases are known to affect Festucalex Rufus.
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