Observations on the ghost fishing in two species of marine heterobranchs (Mollusca Gastropoda): Aplysia depilans Gmelin, 1791 (Aplysidae) and Umbraculum umbraculum ([Lightfoot], 1786) (Umbraculidae)

The present note reports for the first time the finding of two species of marine Heterobranchia within a ghost net. The stretch of the net was repeatedly wrapped in itself and formed a large tangle of spherical shape. This created several "layers" of meshes wrapped in each other, where the following species of marine heterobranchs were found: Aplysia depilans and Umbraculum umbraculum. In particular, of the former, an alive specimen was found tied to the wire of the net, and a dead specimen floating within the ghost net. Of the second species, only the shell was found.