Dendrodorididae: Dendrodoris arborescens (Collingwood, 1881) (‘arborescent sea-slug’)

Synonym(s): arborescens Collingwood, 1881.
Typical body-length 45 mm. Lives intertidally and subtidally on sponges, on which it feeds. Native. Occurs all around Australia (QLD, NSW, TAS, VIC, SA, WA and NT); also elsewhere in the Indo-Pacific.