Home > Invertebrates > Shells > Limpets > Bostrycapulus aculeatus

Created 3/19/2026

Family Calyptraeidae

CIRCUMGLOBAL / HAWAII

Bostrycapulus aculeatus



On dock floats, Mokapu, Oahu, 22-25mm
   

SPINY SLIPPER LIMPET

Abundant in bays and harbors, attached to boats, docks, and pilings.  Shell conforming to the substrate, shape, sculpture, and color variable, with a two-lobed shelf within.  Attains 1.5 inches, 38mm.  A worldwide invasive species introduced to Hawaii by ships during World War Two.  Formerly known as Crepidula aculeata.