pair of nudibranchs mating in indonesia

adventure are beautiful behavior biodiversity biology change climate color colorful conservation coral critters diving ecology ecosystem environment evolution extremely fish gastropod habitat hermaphrodites indonesia lembeh life marine mate mating muck natural nature nudibranchs ocean pacific pair phyllida phyllidia poisonous pustulosa reef research sand scenery scenic science scuba sea seascape slugs snorkeling strait sulawesi these tourism toxic toxins travel underwater water wild wilderness wildlife