tunicate

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Related to Sea squirts: Urochordata

tunicate

or

urochordate

any minute marine chordate of the subphylum Tunicata, containing the sea squirts. They feed by ciliary action and lack a NOTOCHORD, though one is present in the tail of the tadpole larva.
References in periodicals archive ?
Vered searched piers and rocks in the Red Sea resort of Eilat, eventually finding a cluster of sea squirts on a brick.
Carpet Sea Squirt This recent arrival along the North Wales coast was first discovered at Holyhead marina in 2008 by scientists at the School of Ocean Sciences and is said to be a potentially problematic "alien" species as it is highly invasive.
There are more than 2,000 species of sea squirts, and they are found throughout the world.
"The sea squirts were gone, and all of a sudden the glass sponges had tripled" in number, Richter says.
Sea squirts, for example, produce an agent that fights skin cancer.
They have found that cellulose from tunicates, commonly known as sea squirts, can influence the behaviour of skeletal muscle cells in the laboratory.
Percent of Total Known Marine Species by Taxonomic Group Taxonomic Group Percent CRUSTACEANS (lobsters, shrimp, krill) 19 MOLLUSKS (squid, clams, snails) 17 FISH (cod, catfish, tuna) 12 ALGAE (and other plantlike organisms) 10 PROTOZOA (unicellular microorganisms) 10 CNIDARIANS (jellyfish, corals, hydra) 5 ECHINODERMS (starfish, sea urchins, sea cucumbers) OTHER VERTEBRATES (seals, seabirds, turtles) 2 OTHER INVERTEBRATES (sponges, sea squirts, worms) 22 SOURCE: CENSUS OF MARINE LIFE Graph It
From the evolutionary standpoint, individuals who play without getting themselves killed are mere likely to reproduce successfully, whether they are sea squirts (one of the book's examples) or humans.
The thyroid gland, which produces and stores vital thyroid hormones, is introduced as not only the largest endocrine gland but also the oldest phylogenetically; even sea squirts have a thyroid.
In a memorandum it explained that should EU ministers back the move, "Greenland can trade these commodities with the Union [as if they were produced within the EU] provided that Greenland transposes EU sanitary and, where appropriate, animal health rules on fishery products, live bivalve molluscs and by-products derived from these sources." The deal would also cover echinoderms (such as sea urchins and sea cucumbers), tunicates (for instance sea squirts) and marine gastropods (these include whelks, winkles and abalone).
The translucent creatures were sea squirts, animals that usually feed by pushing seawater through their bodies and filtering out plankton.