Pleuractis
Pleuractis is a genus of sea anemones in the family Actiniidae. The genus is currently placed within the subfamily Actiniinae. It is characterized by its columnar body shape, with a distinctive, single, centrally located mouth surrounded by numerous tentacles. The genus includes several species, mostly found in intertidal and shallow subtidal habitats.
Common Names
Species in the genus Pleuractis are commonly known as "sand anemones" or "burrowing anemones" due to their tendency to bury themselves in the sand or sediment.
Characteristics
Pleuractis anemones possess several defining characteristics:
- Columnar Body Shape: The body is cylindrical and elongated, typically with a smooth or slightly granular surface.
- Single, Central Mouth: The mouth is located at the oral disc, surrounded by numerous tentacles.
- Numerous Tentacles: Tentacles are typically arranged in one or more whorls around the mouth, often with a distinct pattern.
- Burrowing Behavior: Many species exhibit a burrowing behavior, partially or completely burying themselves in the sand or sediment.
- Simple Anatomy: Like other sea anemones, Pleuractis species possess a relatively simple body plan, lacking a distinct head or specialized organs.
Environments
Pleuractis anemones are typically found in intertidal and shallow subtidal habitats. They prefer areas with soft sediment, such as sand or mud, where they can burrow and anchor themselves.