Sea Squirts: Ascidiacea
No Common Name (didemnum Studeri): Species Accounts
Physical characteristics: Didemnum studeri sea squirts form flat colonies on rocks. The colonies are 3 feet (1 meter) or more in diameter and are less than 0.2 inches (5 millimeters) thick. The colony is white and covered with tiny pieces of a material that looks like bone.
Geographic range: Didemnum studeri (abbreviated to D. studeri) sea squirts live in the waters just north of the Antarctic regions. They are especially common in the Strait of Magellan.
Habitat: D. studeri sea squirts live in shallow water on rocks and on roots or stems of algae.
Diet: D. studeri sea squirts eat nutrient particles they strain from the water flowing through them.
Behavior and reproduction: D. studeri sea squirts attach themselves to the surface on which they live. The larvae develop inside the colony.
Didemnum studeri and people: D. studeri sea squirts have no known importance to people.
Conservation status: D. studeri sea squirts are not considered threatened or endangered. ∎
FOR MORE INFORMATION
Byatt, Andrew, Alastair Fothergill, and Martha Holmes. The Blue Planet. New York: DK, 2001.
Carson, Rachel. The Edge of the Sea. 1955. Reprint, Boston: Mariner, 1998.
Niesen, Thomas M. The Marine Biology Coloring Book. 2nd ed. New York: HarperResource, 2000.
Parmentier, Jan, and Wim van Egmond. "Sea Squirts: Our Distant Cousins." Microscopy UK. http://www.microscopy-uk.org.uk/mag/indexmag.html?http://www.microscopy-uk.org.uk/mag/artaug98/tuni2.html (accessed on March 3, 2005).
Philipkoski, Kristen. "Sea Squirt Savants Celebrate." Wired. http://www.wired.com/news/medtech/0,1286,51840,00.html (accessed on March 3, 2005).
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