Follow the leader

The species name was previously Risbecia tryoni and now placed under Hypselodoris tryoni.
This Nudibranch is cream in colour with spots of black and light brown edges on their gills. The margins of the body is purple.

This species of Nudibranch are among a few that has the 'following' or 'riding' behaviour where a second Nudibranch will moves continuously following the one in front.