巨型海鳗从安达曼海的巨型桶状海绵中探出头探出

moray eel (Gymnothorax javanicus) peers from within a giant barrel sponge (Xestospongia testudinaria), its mouth opening and closing in a rhythmic breathing motion rather than a threat display. Morays lack the bony gill covers most fish rely on, so they pump water over the gills by continuously opening and closing the mouth, a process called buccal pumping. What looks like a warning gesture is simply the eel keeping oxygen flowing at rest. 4K, vertical wide shot, scuba diver POV. Ko Haa Archipelago, Andaman Sea, Krabi Province, Thailand.