Jorunna rubescens, nudibranch, vertical,front view. Light brown, with white lines and hair and brownish rhinophores and gills. It’s in a transition phase between juvenile (when it’s entirely white) and adult (with brown lines and yellow spots). As a juvenile, it has the same colour and texture of the sponges, where it feeds. Underwater macro photography taken in Lembeh, Manado - Indonesia.