Giant Keyhole Limpet

Megathura crenulata (Sowerby I 1825)

are eaten by

• Global Biotic Interactions: Octopus bimaculatus Verrill 1883 (California two-spot octopus)
• Global Biotic Interactions: Sebastes chrysomelas (Jordan & Gilbert 1881) (Black-and-yellow rockfish)
• Global Biotic Interactions: Sebastes atrovirens (Jordan & Gilbert 1880) (Kelp rockfish)
• Global Biotic Interactions: Oxyjulis californica (Günther 1861) (Señorita)
• Global Biotic Interactions: Sebastes carnatus (Jordan & Gilbert 1880) (Gopher rockfish)

are preyed upon by

• Global Biotic Interactions: Oxyjulis californica (Günther 1861) (Señorita)
• Global Biotic Interactions: Sebastes carnatus (Jordan & Gilbert 1880) (Gopher rockfish)
• Global Biotic Interactions: Sebastes chrysomelas (Jordan & Gilbert 1881) (Black-and-yellow rockfish)
• Global Biotic Interactions: Sebastes atrovirens (Jordan & Gilbert 1880) (Kelp rockfish)
• Global Biotic Interactions: Kelletia kelletii (Forbes 1852)

eat

• Global Biotic Interactions: Iridaea vincent
• Global Biotic Interactions: Acrosorium uncinatum
• Global Biotic Interactions: Styela montereyensis (Dall 1872)
• Global Biotic Interactions: Sargassum muticum (japweed)
• Global Biotic Interactions: Pterygophora californica

prey on

• Global Biotic Interactions: Botryocladia pseudodichotoma
• Global Biotic Interactions: Bugulina californica (Robertson 1905)
• Global Biotic Interactions: Thalamoporella californica (Levinsen 1909)
• Global Biotic Interactions: Polyneura latissima
• Global Biotic Interactions: Cladophora graminea F. S. Collins 1909