Blue Sponge Adocia species
The exact identity of this beautiful, bright blue sponge has not yet been ascertained. It is soft and spongy in texture and grows in irregular branches with a row of large, round osculae running along each branch. It is especially common on the tops of prominent corals and rocks and on steep, shaded reef areas. The blue sponge and many other tropical sponges are recognized as distinct species but have not yet been formally described and named. The dorid sea slug (Jorunna funebris) feeds on this sponge.