Palio dubiaPalio dubia is a species of sea slug, a nudibranch, a shell-less marine gastropod mollusc in the family Polyceridae.DistributionThis species was described from Norway. It has subsequently been reported from the United Kingdom north to Scandinavia, Russia and Greenland. It has also been reported from the Pacific coast of Canada.EcologyIn Scotland and Ireland Palio dubia feeds on the bryozoan Eucratea loricata.