Body shape slug-like with gill structures visible as a single cluster on back of the animal. Pattern includes shades or colours of red and/or white. Animal up to 3 cm long.
Other species of Rostanga occurring in south-eastern Australia are: Rostanga bifurcate with a shallow mid-dorsal crest that is plain red in colour and a spiral egg ribbon that is very tightly folded. Rostanga bassia is dull orange red in colour, its short egg ribbon contains few large eggs from which crawling young hatch.
Often under stones or on algae, to depth of 30 m.
Native to Australia
- DSE Advisory List : Not listed
- EPBC Act 1999 : Not listed
- IUCN Red List : Not listed