algae on a mussel
We often encounter freshwater sponges in Barton Creek and in other creeks in the Austin area. They are frequently overlooked, but actually appear to be quite common. I'm going to find out if I can culture some for identification later.
Dive site Bon Boni Na Kas, max depth 17.4 m/57 ft.
Red Phorbas sponge
Dive site Middle Beach, max depth 58 feet.
Under an overhang.