Asteronotus spongicolus is a very cryptic dorid having following
characteristics :
- the body ranges in colour from brown to yellowish
- the mantle is variable : it can be smooth or with tubercles
- there are a median pale line and white spots on the mantle
- the rhinophores
and gills are difficult to see
This species is mainly recognisable from the sponge it is living and feeding
on : Carteriospongia. You have to look for the animals on the underside
of this sponge.
Asteronotus spongicolus is very similar to Asteronotus
mimeticus. Here is how to distinguish them :
- A. spongicolus has an elongated body with median pale line on the
mantle
- A. mimeticus has an oval body without any median line
