They share many characteristics of shell-less marine mollusks, including dorsal gills that are visible when relaxed and retracted when crawling during low tide.

[2] This species has a cosmopolitan distribution across the entire tropical and subtropical Indo-West Pacific, from South Africa to Hawaii.

[2] Peronia platei has a body that isn't flattened and is grey colored with small rounded protrusions on the exterior surface.

[2]Peronia platei has gills on its back (dorsalnotum) and has hermaphroditic parts in the posterior regions of the deferent duct and straight oviduct.

The specimen has intestinal loops of type V and several dorsal papillae with eyes and rachidian and innermost lateral teeth.