Complex sentence: This dorid nudibranch is bright orange to reddish-orange in colour and the dorsum covered with caryophyllidia; it is very similar to other species of "Rostanga".
Split into simpler sentences: This dorid nudibranch is bright orange to reddish-orange in colour, and the dorsum is covered with caryophyllidia. This species is very similar to other species of "Rostanga".