Home > Invertebrates > Shells > Limpets > Williamia radiata

Created 2/9/2026

Family Siphonariidae

INDO-WEST PACIFIC / HAWAII

Williamia radiata



North shore, Oahu, 3 feet, 6mm

Hapuna, Hawaii, beach drift, 4mm

 
   

RAYED SIPHON SHELL

Uncommon under rocks at any depth.  Shell thin and fragile, translucent brown with dark rays.  Attains 0.3 inch, 7mm.  Mauritius to New Zealand, Taiwan, Hawaii, and Rapa Nui.