Megathura cernulata

(Sowerby, 1825)

Giant Keyhole Limpet

Range: Eastern Pacific Ocean: Baja California and Gulf of California.

Size: 4 inches (10 cm)

Natural Environment: Inhabits the underside of intertidal and subtidal rocks during daytime.

Aquarium Suitability: Not purposely collected for the home aquarium trade.

No special care is required except for a good supply of algae covered rocks.

A very good herbivore yet requires cool water.

Taxonomy:

Kingdom: Animalia

Phylum: Mollusca

Class: Gastropoda

Order: Archaeogastropoda

Family: Fissurellidae

Genus: Megathura

FYI: Shown here for identification.

Has a temperature range of 65 to 75°F (18 - 24°C).