- can be pried off rocks at low tide with a knife.
- after cooking, discard the dark portion (organs) nested within the peak of the shell.
- varieties in the Pacific Northwest are Ribbed limpet (Lottia digitalis),
Shield limpet (Lottia pelta),
Rough limpet (Lottia scabra),
Mask limpet (Lottia persona),
and Rough keyhole limpet (DioDora aspera).
- also occurring on Pacific shores of the United States are the File limpet (Lottia limatula),
and Volcano limpet (Fissurella volcano).
- there is limited data regarding whether eating limpets during a red tide could cause PSP poisoning. But it seems that since there are not filter feeders, toxins do not build up in their tissue as with mussels and other shellfish.