I have given this little dorid the common name of “Spiny Hairy Dorid,” in order to ease identification for those in the Pacific Northwest.  Most people have described this species as Acanthodoris pilosa, but it has been recently redescribed as Acanthodoris atrogriseata and is a different species altogether.  This is a very small acanthodoris with tubercles that rival those of the Acanthodoris hudsoni and Acanthodoris nanaimoisis.  Like the latter two it also has extremely long rhinophores for its diminutive size, but it lacks the yellow margin, yellow tips to its rhinophores and is generally 20mm at its maximum size.  This individual was found laying eggs on what is probably its prey — bryozoans. I would not have noticed this tiny ball of fur if I had not been purposely lifting up and turning bryozoan laden leaf kelp in search of tiny, interesting critters.