Also known as Nudibranch.
Found singly, or in pairs, amongst grass, mud, rubble, and sand, often buried in the substrate for protection, over intertidal zones, of bays and lagoons. When predators come too close, they will discharge a purple fluid to warn them off.
They feed on algae and plants.
Length - ?cm
Depth - ?m
Opisthobranchia - Nudibranchs - Sea Slugs meaning "naked gills" are molluscs without a hard shell. Ref: https://en.wikipedia.org/wiki/Aplysia