Any non-calcareous brown encrusting algae

PHOTO CREDIT: James Watanabe https://seanet.stanford.edu/red

Other images:

Distinguishing features: Fleshy/spongey to the touch. Brown looking in color. Grows synonymous to rocks, can be bumpy or flat.

Easily confused species and differentiation: UFAC, URFC

Extended Description: If you can’t delineate color, resort to UFAC.