Marine flatworms can dazzle with wild colors and patterns – if you’re lucky enough to see one. They live from the intertidal to tropical coral reefs to deep water. The free-living flatworms (polyclads) have thin, almost leaf-like bodies and move with a gliding motion. Their ancestors were some of the first bilateral animals, and being bilateral gives them a body plan designed for an active life style.
At Shape of Life, we call the flatworm phyla video "First Hunter," and indeed these animals are active carnivorous predators that feed on a wide variety of animals including copepods, isopods, limpets, barnacles, tunicates, and bryozoans.