Fissurella nigra, common name the black keyhole limpet, is a species of sea snail, a marine gastropod mollusk in the family Fissurellidae, the keyhole limpets and slit limpets.

[1][2] The size of the shell varies between 45 mm and 110 mm.

This marine species occurs in the Pacific from Paru to the Strait of Magellan (but not off the Galapagos Islands)

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