Ceratosoma trilobatum #nudibranch can grow up to 15cm in length. Taken by #Underwaterphotographer #DanielSasse #poseidondivecenter #natgeoyourshot #Scubadiving #Aonang #Krabi #instadive #Marinelifeprotection #Ouroceans #Underwaterphotography #natgeo #nature #uwpic #Savetheoceans #Marineconservation #Oceandefender #Saveourseas #underwaterlife #fish #ecowarrior #natgeowild #blueplanet #scubashooter