: While sea anemones are typically solitary, many Actinozoans (like reef-building corals) form massive colonies of interconnected clones. Classification

: Unlike many other cnidarians (such as jellyfish), Actinozoans do not have a medusa (free-swimming) stage in their life cycle. They remain as polyps throughout their lives.

(now more commonly known as the class Anthozoa ) is a major group of marine invertebrates within the phylum Cnidaria . This class includes well-known sea creatures like sea anemones, stony corals, soft corals, and sea fans. Key Characteristics

: Includes sea anemones and stony corals. They typically have tentacles and mesenteries in multiples of six.

The name Actinozoa stems from the Greek words aktis (ray) and zoon (animal), referring to their radial symmetry and the "ray-like" appearance of their tentacles.