It digests hydroids without setting off their stinging cells and moves them intact to the tips of its cerata, where it uses them for its own defence.
From Slender Facelina
The ringed rhinophores on its head serve to track its prey by chemical scent.
From Slender Facelina
It steals its prey's weapons. It eats hydrozoans and, instead of digesting their stinging cells, keeps them intact and moves them into sacs called cnidosacs, at the tips of the cerata on its back.
From Slender Facelina
The adults camouflage themselves by taking on the shade of the soft coral colony they live on and feed from.
From Homberg's Plumed Nudibranch
The largest individuals exceed 20 cm, an extraordinary size for a cold-water nudibranch.
From Homberg's Plumed Nudibranch
It is the largest nudibranch in the British Isles: it reaches 20 cm.
From Homberg's Plumed Nudibranch
It can deliberately shed fragments of the edge of its mantle to distract a predator, a form of autotomy uncommon among nudibranchs.
From Bohol Discodoris
It self-mutilates to escape: when attacked it sheds pieces of its mantle margin, which writhe and distract the predator while it flees. The margin regenerates afterwards.
From Bohol Discodoris

Ecosystems