The original 1997 color description for P. murinus reads: "Body transparent mottled grey-green with evenly spaced small black and white dots in irregular, scattered clusters dorsally; darker medially with red or brown tinge. Margin with a narrow yellow-orange band; extremely narrow, clear rim. White dots forming triangle between pseudotentacles, pseudotentacles with red tinge and white tips. Ventrally whitish grey with opaque white dots. Pseudotentacles long, pointed, ear-like and held erect. "
Pseudobiceros murinus ist in Gezeitenpools recht häufig regional zu finden.