Clavelina cylindrica is a species of colonial tunicate, commonly known as a sea squirt, belonging to the family Clavelinidae. These fascinating creatures are filter feeders, playing an important role in marine ecosystems.
Description and Characteristics
Clavelina cylindrica colonies are characterized by their cylindrical shape, giving rise to their specific name. Individual zooids, or individuals within the colony, are typically small, reaching a maximum size of about 10 millimeters. Each zooid possesses a distinct, transparent tunic, giving the colony an overall translucent appearance.
Habitat and Occurrence
Clavelina cylindrica is commonly found in the northeastern Atlantic Ocean, specifically in the British Isles and the Mediterranean Sea. This species primarily inhabits shallow coastal waters, often attaching itself to various substrates like rocks, seaweeds, and even shells. It thrives in the intertidal zone and subtidal zones, extending its range to depths of up to 50 meters. These marine zones provide suitable conditions for Clavelina cylindrica to flourish.
Taxonomy
Clavelina cylindrica is classified within the phylum Chordata, belonging to the class Ascidiacea, order Aplousobranchia, and family Clavelinidae. This taxonomic categorization reflects its unique characteristics and evolutionary relationships within the broader animal kingdom.
Feeding
Clavelina cylindrica, like other tunicates, is a filter feeder. It obtains its food by drawing in water through an incurrent siphon. This water contains microscopic organisms like phytoplankton and zooplankton, which are captured by a mucus net within the pharynx. The food particles are then transported to the digestive system, where nutrients are extracted. Excess water is expelled through an excurrent siphon.
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