I know the guy on the right is Hermissenda crassicornis... what about the one on the left? These two were definitely interacting with one another.
A nudibranch ( /ˈnjuːdɨbræŋk/) is a member of what is now a taxonomic clade, and what was previously a suborder, of soft-bodied, marine gastropod mollusks which shed their shell after their larval stage. They are noted for their often extraordinary colors and striking forms. The clade Nudibranchia is the largest clade within the heterobranchs, with more than 3,000 described species.
