Phyllidiaflava is a small to medium sized nudibranch. It is
coloured yellow with several papillae on the notum. The
larger papillae are white but many small ones are yellow.
The colour of the animal offers camouflage to it as it
feeds on yellow Axinella sponges.
Oral tentacles: 2 in number, very short, yellow. Rhinophores: Yellow, lamellate, retractile. Gills: Present on side of body below notum, anal opening
postero-dorsal. Foot: Yellow (ventrally) without any appendages.
Size range: 13-18mm. Uncommon.
Specific characteristics: This species is easy to
distinguish from related species by its colouration,
presence of white papillae over the body and its habitat.