Golf Sponge Balls
This furry ball-shaped sponge is sometimes seen on coral rubble on some of our shores. Sometimes with shallow circular depressions, it then resembles a golf ball. It is one of the most common and abundant sponges on intertidal and shallow reefs. Elsewhere, they thrive in silty areas.
6-8cm in diameter, spherical densely covered with short, fine spines.
These are needle-shaped spicules that stick out of the surface.