The Glaucus Pimplet, Rock Anemone, scientifically known as Anthopleura thallia, is a fascinating marine invertebrate belonging to the family Actiniidae. This species, often found clinging to rocks and other hard substrates, is a common sight in coastal waters, showcasing the diversity of the marine ecosystem.
Description & Characteristics
Anthopleura thallia is a relatively small anemone, typically reaching a maximum size of a few centimeters in diameter. Its body is cylindrical, with a smooth, leathery texture. The anemone’s most distinctive feature is its oral disc, which is surrounded by numerous tentacles. These tentacles are typically white or cream-colored, with the tips often displaying a reddish-brown hue. They are covered in stinging cells called nematocysts, which are used to paralyze prey.
Habitat and Occurrence
The Glaucus Pimplet, Rock Anemone, Anthopleura thallia, is typically found in intertidal and subtidal zones, often inhabiting rocky shores and tide pools. These anemones are particularly common in the infralittoral zone, which extends from the low tide mark to depths of around 20 meters. Anthopleura thallia is prevalent throughout the North Atlantic Ocean, extending from the coasts of Europe to those of North America.
Taxonomy
Anthopleura thallia belongs to the order Actiniaria, which includes a wide variety of sea anemones. These anemones, in turn, belong to the class Hexacorallia, a group characterized by the presence of six or multiples of six tentacles. The family Actiniidae, to which Anthopleura thallia belongs, is a diverse group that includes many common and widespread sea anemones.
Feeding
The Glaucus Pimplet, Rock Anemone, Anthopleura thallia, is a carnivorous species, feeding primarily on zooplankton. It uses its stinging tentacles to capture and paralyze its prey. The paralyzed prey is then brought to the mouth, located in the center of the oral disc, and consumed.
Image References