Spanish Dancer (Hexabranchus sanguineus). Spectacular and largest of the nudibranchs (naked gills) and are reported to reach up to 50 cms in length. Nocturnal. Red Sea.

spanish dancer hexabranchus sanguineus sea slug nudibranchs naked gills gills nocturnal red sea egypt one animal lone single coral underwater red seaslug spanish dancer sealife sea life vibrant colourful