flatworm crawling in green grape algae in derawan, kalimantan, indonesia underwater photo

algae also among animal aquatic background biodiversity black blue camera caulerpa cave color commonly coral crawling derawan dive diver divers diving ecosystem ecotourism explore fish flatworm grape grapes green holiday indonesia island kalimantan known life marine natural nature ocean photo photographer photography pseudoceros racemosa red reef scuba scubadiving sea site sun the travel tristriatus tropical underwater vacation water wildlife