Common name: Crater Sea Squirt

General information

Aplidium crateriferum, commonly known as the Crater Sea Squirt, is a colonial ascidian found in various marine environments. This species is characterized by its unique crater-like appearance, with individual zooids embedded in a common tunic. The coloration of Aplidium crateriferum can vary from pale yellow to orange, and it often forms extensive mats on hard substrates.

Care

In the aquarium, Aplidium crateriferum requires a stable environment with moderate to strong water flow and good water quality to thrive. It is a filter feeder, capturing plankton and dissolved organic matter from the water column. Hobbyists should ensure that the aquarium is well-established and that supplemental feeding with phytoplankton or fine particulate foods is available.

Reproduction

As a colonial ascidian, Aplidium crateriferum reproduces both sexually and asexually. Sexual reproduction involves the release of sperm and eggs into the water column, where fertilization occurs. The resulting larvae settle on suitable substrates and form new colonies. Asexual reproduction occurs through budding, where new zooids develop from the parent colony, allowing for rapid expansion.

Habitat

Aplidium crateriferum is typically found in temperate to tropical waters, often attached to rocks, pier pilings, or other hard substrates. It can be found at various depths, usually from the intertidal zone down to several meters below the surface. This species is adaptable and can be found in a range of marine environments, from sheltered bays to exposed reef systems.