Home > Invertebrates > Shells > Limpets > Crucibulum spinosum

Created 3/19/2026

Family Calyptraeidae

CIRCUMGLOBAL / HAWAII

Crucibulum spinosum



On dock floats. Mokapu, Oahu, 18-25mm

 
   
   

SPINY CUP-AND-SAUCER

Common on manmade objects, or rocks and rubble within harbors.  Shape conforms to the substrate, sculpture and color variable, with a vase-shaped cup below the apex.  Attains 2.8 inches, 71mm.  A worldwide invasive species introduced to Hawaii by ships during World War Two.