Spanish shawl sea slug (Flabellina iodinea) on algae. This sea slug,or nudibranch,inhabits the waters of the eastern Pacific Ocean,from Canada to the Galapagos Islands. It feeds mainly on hydroids,coral-like organisms. Its body is covered in long cerata (orange),which act as its main respiratory surface,as it has no gills. As well as the cerata,it has two rhinophores (red- tipped,centre right),with which it detects chemicals in the water. Two long antennae are seen at centre and lower right. This sea slug can reach a length of up to three centimetres |