Cf. Acanthozoon sp. 2

Scientific name : Cf. Acanthozoon sp. 2

Large polyclad (8 cm), red-brownish colour, with the bnack covered with large papillae, some white tipped. Thin white marginal line. 
Photographed in bay, at night.
No other species has those high papillae on the back, giving to the animal a hairy appearance.