Polycarpe Aux Siphons Piqués De Blanc

Overview

Polycarpa pigmentata is a large, solitary ascidian, or sea squirt, commonly found in tropical marine environments. Like other members of its genus, it is a sessile filter feeder that attaches itself to hard substrates to extract nutrients from the water column.

Appearance

The body of this tunicate is often obscured by a layer of algae or other encrusting organisms, which helps it blend into its surroundings. A key identifying feature, from which its French common name is derived, is the interior of its siphons. These are typically colored in shades ranging from orange-brown to violet and are distinctively marked with white spots.

Distribution & habitat

This species is widely distributed across the Indo-Pacific region, including areas such as Indonesia, the Philippines, and various islands in the South Pacific. It is typically found in rocky or coral reef environments, where it anchors itself to the substrate.

Biology & behavior

As a filter feeder, it draws water in through its buccal siphon, passing it over internal branchial structures to trap food particles in mucus before expelling the filtered water through the cloacal siphon. Like many other ascidians, it is hermaphroditic, releasing gametes into the water column for fertilization. This process results in the development of a free-swimming, tadpole-like larva that eventually settles on a suitable surface to begin its adult life as a stationary organism.