Two-stick stingfish (Inimicus filamentosus) on the seabed. This fish, also known as the filament devilfish, inhabits the tropical waters of the Indian Ocean. It lies motionless on the seabed or a reef, and uses its cryptic colouration to avoid detection. When prey, a small fish or shrimp, nears its mouth, it engulfs it with a sudden gulp. It has a row of poisonous spines along its back to deter predators. These can deliver a very painful sting, but this is not fatal to humans. Photographed off Sulawesi, Indonesia.
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