Persian Carpet Flatwork slithers and crawls across the sandy bottom near a coral reef

persian carpet flatworm flatworm sea slug nudibranch pseudobiceros marine life pseudocerotidae reef worm scuba underwater slug coral scuba diving biodiversity diver bottom animal slithering sea wildlife crawling south east asia pattern exotic ocean dive marine sandy slime following closeup flat nature bizarre persian beautiful natural odd away tropical moving sliding carpet water travelling background elegant colorful