Common name: dirty sea-squirt

General information

The European Sea Squirt, Ascidiella aspersa, is a sessile invertebrate commonly found in the cooler waters of the North Atlantic Ocean. It is a member of the Ascidiacea class, which are more commonly known as ascidians or sea squirts. These organisms are filter feeders, using their siphons to draw in water and extract plankton and other organic particles for nutrition.

Care

Ascidiella aspersa is not a common species in the reef aquarium trade, but it can be kept by advanced hobbyists who can provide the stable and specific conditions it requires. They need a mature system with excellent water quality and a strong current to mimic their natural environment. It's important to ensure that they receive a steady supply of fine particulate food to filter from the water.

Reproduction

Sea squirts are known for their unique reproductive strategies. Ascidiella aspersa can reproduce both sexually and asexually. In sexual reproduction, they release sperm and eggs into the water column where fertilization occurs. Asexually, they can bud from the parent organism, creating clones.

Habitat

Ascidiella aspersa typically attaches to hard substrates such as rocks, shells, or man-made structures like piers and boat hulls. They are often found in shallow waters but can also inhabit depths down to several hundred meters. They are tolerant of a range of temperatures and salinities, which reflects their wide distribution in the North Atlantic.