image: Testudinalia testudinalis. Tortoiseshell limpet and white tortoiseshell limpet on coralline encrusted rock, Saltstraumen, Norway.

Testudinalia testudinalis (O. F. Müller, 1776)
Tortoiseshell limpet and white tortoiseshell limpet on coralline encrusted rock, Saltstraumen, Norway.

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