Boltenia echinata
species of chordates
Boltenia echinata, commonly known as the cactus sea squirt, is a species of tunicate, a marine invertebrate in the genus Boltenia of the family Pyuridae. It is native to the Arctic Ocean and the northern Atlantic Ocean.
Description
Boltenia echinata is a solitary sea squirt with a globose or ovoid body up to 2 cm (0.8 in) in diameter. The two small siphons are four-lobed and are near the top of the animal. The base is attached to the substrate over a large area. The test is tough and rubbery and bears radially-branching spines, which resemble hairs. The body colour is brown and the siphons may be tinged red, but the sea squirt is very inconspicuous because it is usually covered with silt.
Distribution and habitat
Boltenia echinata occurs in the northern Atlantic Ocean and the Arctic Ocean. The range includes the coasts of Scotland and the Irish Sea, but not southern Britain. It is usually found in fairly sheltered silty habitats, attached to solid substrates at depths down to about 350 m (1,100 ft).
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This entry incorporates text from “Boltenia echinata” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.