Home > Invertebrates > Shells > Limpets > Williamia radiata

Created 2/9/2026

Family Siphonariidae

INDO-WEST PACIFIC / HAWAII

Williamia radiata



North shore, Oahu, 3 feet, 6 mm

Hapuna, Hawaii, beach drift, 4 mm

 
   

RAYED SIPHON SHELL

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