Megathura crenulata (Sowerby I, 1825)
Giant keyhole limpet
photo by Coltro, Marcus

Family:  Fissurellidae (keyhole limpets)
Max. size:  12.5 cm TL (male/unsexed)
Environment:  benthic; marine; depth range 0 - 33 m
Distribution:  Eastern Pacific: USA to Mexico.
Diagnosis:   
Biology:  It is found on rocky substrate from intertidal to a depth of 33 meters (Ref. 865).
IUCN Red List Status: Not Evaluated (N.E.) Ref. 123251)
Threat to humans: 
Country info:   
 

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