This encrusting yellowish sponge is found under rocks, usually on lagoon reefs. Aside from the color, it looks very similar to a purple form and is likely the same species. Both color forms are preyed upon by the nudibranch Hallaxa cryptica, which takes on the color of the sponge it is eating.
With the nudibranch Hallaxa cryptica.
Created 1 June 2019