Scutus is a genus of large sea snails or limpets with the common name "shield shells".

These are marine gastropod molluscs in the family Fissurellidae, the keyhole limpets and slit limpets.

[1] Both the common name and the scientific name reflect the fact that the shells of species in this genus resemble a Roman shield.

The animal itself has a large black mantle which usually completely covers the shell, giving the animal a superficially slug-like appearance.

Species within the genus Scutus include:[2]