An evolutionary oddity on the seafloor
The red-lipped batfish (Ogcocephalus darwini) is a fish that defies expectations. Found on the sandy bottoms around the Galápagos Islands, it has largely abandoned swimming for a more terrestrial form of movement. This fish uses its pectoral, pelvic, and anal fins, which are highly adapted, to "walk" across the ocean floor. This strange gait allows it to navigate the rubble and sand of its habitat at depths ranging from 3 to 76 meters.
Its body is not built for efficient swimming. The flattened, disc-like shape creates drag, and when startled, its swimming appears awkward and clumsy. Instead of fleeing, it relies on its unique locomotion and camouflage. The fish's light brown and grayish dorsal side, often with a dark stripe of brown dots, helps it blend in with the seabed. This combination of walking and camouflage makes it an effective ambush predator, a necessity for a creature that cannot chase down its food. The fish's anatomy is suited for this lifestyle, with a body structure supported by 19 to 20 vertebrae.