limpets

rough keyhole limpet

Scientific name: Diodora aspera 

Family: Fissurellidae

Phylum: Mollusca 

Typical size: 7 centimeters long 

Depth range: Intertidal to 40 meters 

Description: Has a rough texture with a small circular opening at the very top of its shell. It has a white shell with rings of different shades on it.

Habitat and behavior: Lives from Alaska to Nicaragua. Its shell is often covered in sea life like bryozoans.