- Kingdom: Animalia
- Phylum: Mollusca
- Class: Gastropoda
- Subclass: Heterobranchia
- Order: Nudibranchia
- Suborder: Dexiarchia
- Infraorder: Dendronotida
- Superfamily: Tritonioidea
- Family: Tritoniidae
- Scientific name: Tritonia hombergii
- Norwegian: korallsnegl
This is propably the largest nudibranch in Norway, reaching a maximum length of 20 cm. A typical feature is all the gills along the edge of the mantle. The head tentackles, the rhinophores, are branched. Juveniles are often white or colored in pale shades, while adults may be mottled in vivid shades of brown, yellow or orange.
You should not touch this slug, as it can give blisters. These are caused by a secretion from the warts on the mantle.
The Tritonia hombergii's main diet is the soft coral A. digitatum, and thrives on the same current exposed locations. The usual depth range is from the subtidal zone and down to 80 meters.
This nudibranch is known from North-West Europe, from Norway to Spain.