The red-lipped batfish looks like it was designed by someone who couldn’t decide whether they were making a fish, a bird, or a cartoon character. With its pouty red mouth and awkward, walk-like swim, it’s one of the ocean’s most peculiar residents. Found around the Galápagos Islands, it’s proof that evolution sometimes has a sense of humour.
What makes this creature stand out isn’t just how odd it looks, but how uniquely adapted it is. It can’t swim well, so it uses its fins like legs to shuffle along the sea floor, looking perpetually unimpressed. Beneath the silliness, though, lies a fascinating example of how animals evolve to survive in their own strange corners of the planet.
It literally wears bright red lipstick.
The fish has vivid red lips that look exactly like badly applied lipstick. There’s no subtle colouring here, it’s bright red contrast against its dull brown body. Scientists aren’t entirely sure why they have these lips but suspect it helps attract mates. The red lips are the first thing you notice. It looks like the fish raided someone’s makeup bag. The ridiculous appearance is completely genuine and serves some evolutionary purpose we don’t fully understand.
It can’t actually swim properly.
Despite being a fish, the red-lipped batfish is terrible at swimming. It’s adapted for life on the seafloor and uses modified fins to walk instead. Swimming is awkward and ungainly for this fish that lives in water. Evolution decided this fish didn’t need swimming skills and gave it walking legs instead. It waddles along the ocean floor like a drunk person. For a fish, this is embarrassing.
Its fins evolved into leg-like appendages.
The pectoral and pelvic fins are modified into limb-like structures that function as legs. The fish literally walks on the seafloor using these leg-fins. It looks less like swimming and more like stilted walking. Fish aren’t supposed to walk, but nobody told the batfish. These leg-fins are perfectly functional for walking but make the fish look absurd. It evolved to be a bottom-dwelling walker rather than a swimmer.
It has a fishing rod on its head.
Like anglerfish, batfish have a modified dorsal spine that acts as a lure. However, the batfish’s lure is stubby and hidden inside its head, making it fairly useless. It’s basically a vestigial fishing rod. The lure retracts into a tube in its head when not in use. Scientists think it might attract prey, but it’s not particularly effective. Evolution gave this fish a fishing rod, then forgot to make it work properly.
Young batfish look completely different.
Juvenile batfish are flat, almost leaf-like, and drift in open water. As they mature, they become the weird walking fish with red lips. The transformation is so dramatic, they barely look like the same species. Baby batfish are adapted for floating while adults walk on the bottom. The life stages look so different that historically they were classified as separate species. Growing up means completely changing body plan.
It lives around volcanic islands.
Red-lipped batfish are endemic to the Galápagos Islands and occasionally found near other volcanic islands off South America. They live in relatively shallow water around volcanic rock formations. Their range is quite limited. These fish are specifically adapted to this volcanic island environment. They’re not found globally, just in these specific locations. Evolution created this ridiculous fish for a very particular habitat.
The red lips might be for species recognition.
Current theory suggests the bright red lips help batfish identify their own species, particularly for mating. In the murky seafloor environment, distinctive facial markings help find suitable mates. The lipstick look is functional, apparently. This means the silly appearance serves a serious purpose. Female batfish presumably find these red lips attractive. Beauty standards in the fish world are truly bizarre.
It eats by ambush, badly.
Batfish are ambush predators that wait on the seafloor for small prey to wander past. Given they can’t swim well and have a useless lure, their hunting strategy is basically hoping food walks into their mouth. They eat small fish, crustaceans, and worms that get too close. Their hunting technique is less skilled predator and more sit around hoping something edible shows up. It apparently works well enough.
Scientists initially thought it was a joke.
When specimens were first described, scientists reportedly struggled to believe this was a real fish and not some sort of practical joke. The combination of red lips, walking legs and general weirdness seemed too absurd to be genuine. Even in scientific literature, descriptions of batfish often reference their ridiculous appearance. Scientists are professionally obliged to maintain objectivity, but clearly find these fish hilarious.
It belongs to a whole family of weird fish.
Batfish are part of the Ogcocephalidae family, which contains about 60 species of equally bizarre bottom-dwelling fish. The red-lipped batfish might be the most famous, but the whole family is strange. Other batfish species have different weird features, but all share the basic body plan of flat, walking fish. Nature decided to make not just one ridiculous fish but an entire family of them.
The lips get brighter during mating season.
The red lips become even more vivid when batfish are ready to mate. This supports the theory that the lips are signalling for mating. Batfish literally put on more lipstick when looking for romance. Male and female batfish both have the red lips, so it’s not just males showing off. Both sexes use the bright lips to communicate readiness to breed. Everyone gets to wear the ridiculous lipstick.
It’s surprisingly well camouflaged despite the lips.
Apart from the bright red mouth, the batfish is actually quite camouflaged. The brown mottled body blends well with volcanic rocks and seafloor. Only the lips stand out, which is probably the point. From above, these fish are nearly invisible against the bottom. Then you see the bright red lips and realize there’s a fish down there. The contrast between hidden body and obvious lips is intentional design.
They can survive in quite deep water.
Red-lipped batfish are found from shallow water down to about 120 metres depth. They’re adapted to handle the pressure changes and reduced light at depth. The red lips remain visible even in deeper, darker water. Most photos show shallow-water individuals, but these fish range into surprisingly deep habitat. The red colouring must work as a signal, even where light is limited, and most colours are filtered out.
Tourism has made them minor celebrities.
Divers visiting the Galápagos specifically look for red-lipped batfish because of their ridiculous appearance. They’ve become social media famous as one of the ocean’s weirdest-looking creatures. Their bizarre looks have made them conservation icons. The batfish doesn’t care about its celebrity status and continues waddling around the seafloor wearing lipstick like nothing’s unusual. For this fish, looking absolutely ridiculous is just normal existence.