Polycera marplatensisPolycera marplatensis is a species of sea slug, a nudibranch, a shell-less marine gastropod mollusc in the family Polyceridae.DistributionThis species was described from Mar del Plata, Buenos Aires, Argentina,. It has been reported from Brazil to Patagonia.EcologyPolycera marplatensis is common in the intertidal zone where it feeds on the Bryozoan Bugula sp..