Fissurella is a genus of small to medium-sized sea snails or limpets, marine gastropod mollusks in the subfamily Fissurellinae of the family Fissurellidae, the keyhole limpets.

The propodium (= the anterior end of the foot) has no tentacles.

Like all other fissurellids, Fissurella species are herbivores, using the radula to scrape up algae from the surface of rocks.

Water for respiration and excretion is drawn in under the edge of the shell and exits through the "keyhole" at the apex.

According to the World Register of Marine Species (WoRMS), the following species with accepted names are included within the genus Fissurella [3] The Indo-Pacific Molluscan Database adds the following species to the list [5] The following species are also mentioned by Schooner specimen shells.