Umbraculum umbraculum (Umbrella slug)


Various colors, from yellow, to red, brown and black, covered in white to yellow papillae. On top it has a flat shell, usually covered in weeds, anemones or sponges.


Unassessed by the IUCN Red list, but a circumtropical species.


Circumglobal species in tropical and temperate seas as well as the Mediterranean. They can be found on reefs and burrowing under rocks, in a very wide depth range of 0-270 meters.


Not much is known about their reproduction, although most members of the order of Pleurobranchomorpha (sidegill slugs) are simultaneous hermaphrodites.


Up to 12cm.

Prey / Predation

They feed on sponges. They have a very wide radula to rasp away at their sponge prey. They have been observed to feed on species of the Demospongia , including  Tethya spp., Aaptos aaptos, Ancorina alata, and Plakina trilopha.

Special features

Umbraculum umbraculum is also referred to by another common name, umbrella shell.