Body narrow and slender with a very long and pointed tail. Oral tentacles notably longer than rhinophores and cerata, and sharply tapering. Anterior foot corners prolonged into pointed tentacles. Rhinophores smooth. Cerata arranged in six distinct clusters with a few single cerata at the posterior end.
body color translucent orange with a paler foot, almost white. Head orange with two white streaks running forward from the base of each rhinophore. Cerata, rhinophores and oral tentacles with vivid colors. Cerata banded with deep red, orange, blue, yellow, and white. Oral tentacles orange basally, yellow in the middle, with a white distal part. Rhinophores with an orange basal region, followed by a short white band and yellow tip. Tail and foot tentacles yellow-tipped.
common size :
up to 50 mm in length, usually between 20 and 30 mm. The Mediterranean specimens measured 13 and 15 mm.
This large aeolid is characterized by an orange head with two white streaks, and by the distinctive bright color of the cerata. The unique native species of the genus Caloria in the Mediterranean, C. elegans (Alder and Hancock, 1845), has a white body color with a conspicuous subapical black spot in each ceras.
BIOLOGY / ECOLOGY
In the Indo-Pacific it is active during the day and feeds on hydroids (genera Salacia, Halocordyle, and Eudendrium).
relatively shallow reef, down to 15 m deep, and rock pools.