On removal of the pea crab, breeding in the slipper limpet resumes. Calyptraeotheres garthi is a species of pea crab in the family Pinnotheridae. The pea crab lives in the mantle cavity of these hosts. The pea crab relies solely on its host for food, safety, and oxygen. The New Zealand pea crab can infect from 5.3% to 70% of natural populations.