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| NAS - Nonindigenous Aquatic Species |
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Common Name: a white crust tunicate
Taxonomy: available through 
Identification: Members of this genus are colonies of tough crusts densely infiltrated with microscopic calcareous spicules. Most comonly white, less often yellow to reddish. Sometimes encrusting and taking the form of bushy bryooans and other supports. D. candidum has spicules less than 0.02 mm (Gosner 1978).
Size: Colonies 3-4 inches (75-100 mm); to 3/16 inches (5 mm) thick (Gosner 1978).
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Interactive maps: Continental US, Alaska, Hawaii, Caribbean
Nonindigenous Occurrences: Observed at Georges Bank, 160 miles off outer Cape Cod, Massachusetts (Anonymous 2004)
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Revision Date: 4/24/2006 Citation for this information:
United States Geological Survey. 2010. Didemnum cf. lahillei. USGS Nonindigenous Aquatic Species Database, Gainesville, FL.
<http://nas.er.usgs.gov/queries/FactSheet.asp?speciesID=2338> Revision Date: 4/24/2006
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