Cnidarians are a group of marine animals that includes jellyfish, corals, sea anemones, and hydras. They are characterized by having soft, gelatinous bodies, often shaped like a sac or a polyp.
They have tentacles surrounding their mouth that contain specialized cells called cnidocytes, which allow them to capture prey and defend themselves.
Cnidarians are primitive animals and are widely distributed in oceans around the world. They play an important role in marine ecosystems and are known for their vibrant colors and unique shapes.
