Pink Rock Crust

Pink Rock Crust (On Keyhole Limpet and Rock)

Common Name: Pink Rock Crust
Scientific Name: Crustose Corallines
Size: Greatly varies.

Identifying Features: Flat, various shapes of rough crust usually attached to rocks, shells, coral, seaweed etc.  It is rough due to calcium carbonate in the cell walls of the plant.
Habitat: It can be spotted in subtidal and intertidal zones but may also occur in the deep ocean.