Didemnum lahillei is a colonial tunicate, belonging to the family Didemnidae, which is characterized by its striking resemblance to a sponge or a thin mat. This species forms colonies that can reach several centimeters in size, often spreading across rocks and other hard surfaces.
Description & Characteristics
Colonies of Didemnum lahillei are typically thin and flat, resembling a crust or a mat. They can grow to a maximum size of several centimeters in diameter. These colonies are composed of numerous small, individual zooids, each with its own feeding apparatus and reproductive system. The surface of the colony is often covered in small, round openings, known as siphons, which are used for feeding and reproduction. The color of Didemnum lahillei colonies can vary, ranging from white to yellow to orange.
Habitat and Occurrence
Didemnum lahillei is typically found in shallow water, particularly in the intertidal zone, though it can occur in depths of up to 10 meters. It prefers habitats with strong currents, such as rocky shores, piers, and docks. This species has been recorded in temperate and tropical marine zones around the world, indicating a wide distribution across various climate regions.
Taxonomy
Didemnum lahillei is classified within the phylum Chordata, belonging to the Class: Ascidiacea, Order: Aplousobranchia, and Family: Didemnidae. This placement reflects its evolutionary history and close relationships to other tunicates.
Feeding
Like other ascidians, Didemnum lahillei is a filter feeder. It draws water into its siphons and filters out microscopic food particles such as phytoplankton and zooplankton. This filter feeding process plays a vital role in the marine ecosystem by contributing to water clarity and nutrient cycling.
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