The name suits this nudibranch almost perfectly. Pale blue and white bands run lengthwise across its back, broken by bold dark stripes that give it the unmistakable look of a tiny pair of striped pyjamas. A bright yellow-orange border wraps around the mantle, with matching orange rhinophores and gills adding a lively finishing touch. It is an unusually playful pattern for a creature carrying such a serious warning, since its vivid colors advertise the chemical defenses it gains from the sponges it feeds on.
Size: Up to around 50 mm
Range: Red Sea, western Indian Ocean, and parts of the eastern Mediterranean
Habitat / Depth: Rocky reefs, reef flats and sponge-covered substrates, generally shallow waters down to around 30 m
Diet: Sponges, particularly Negombata and related red encrusting sponges
