Anemones

Sea anemones are marine invertebrate animals related to corals and jellyfish. Named for their resemblance to the colorful terrestrial flower, these "flowers of the sea" attach themselves to rocks, shells, or the ocean floor using a sticky basal disc, though they are capable of slowly creeping or "swimming" to new locations.

Key Characteristics
Anatomy: They are polyps with a cylindrical body, a central mouth, and a ring of hollow tentacles. Sizes range from a tiny 0.5 inches to over 6 feet in diameter.

Feeding: Sea anemones are carnivores. Their tentacles contain microscopic, harpoon-like stinging cells called nematocysts. When triggered, these inject a paralyzing venom into passing prey (like small fish and crustaceans) before pulling it into their mouth.

No Brain: Despite being complex predators, they lack a brain or skeleton, relying instead on a decentralized nervous system to process touch, light, and chemicals.

Symbiosis: Many species form famous partnerships, such as hosting clownfish. The anemone provides the fish with protection using its venomous tentacles (to which the clownfish are immune), while the fish cleans the anemone and helps deter predators.

Reproduction: They can reproduce sexually (releasing eggs and sperm into the water) and asexually (splitting in half or breaking off pieces to form new clones)