Platydoris argo - Redbrown leathery doris

Platydoris argo  (Linnaeus, 1767) 

Redbrown leathery doris

Plage del Forat, Port Vendres, France, 3-9-2021. Crop of next photo.

Plage del Forat, Port Vendres, France, 3-9-2021. 

Identification by Dr. Manuel Ballesteros Vázquez (18-11-2024).