>It is an excellent popular article for anyone interested in the scary
spreading >of these destructive invaders from the Caspian Sea.
Zebra mussels do occur in the Caspian Sea, but the North American invaders
originated in the Black Sea. Two species have invaded, Dreissena polymorpha
and Dreissena bugensis; the latter is known as the quagga mussel.
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Gary Rosenberg, Ph.D. [log in to unmask]
Malacology & Invertebrate Paleontology gopher://erato.acnatsci.org
Academy of Natural Sciences http://www.acnatsci.org
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