Killer Cuckoo Catfish | National Geographic

A mother cichlid fish protects her young by keeping them in her mouth. But these crafty cuckoo catfish have caught on — and they’re angling to turn her offspring into dinner. ➡ Subscribe: About National Geographic: National Geographic is the world’s premium destination for science, exploration, and adventure. Through their world-class scientists, photographers, journalists, and filmmakers, Nat Geo gets you closer to the stories that matter and past the edge of what’s possible.