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Most annelids in the taxonomic class ______ are marine.

Hirudinea

Oligochaeta

Polychaeta

all of the above

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Polychaeta - over 8000 species of annelid worms that are mostly marine.
Oligochaeta - about 3100 species of annelids that includes earthworms and many species that live in freshwater.
Hirudinea - about 500 species of marine, freshwater, and terrestrial worms commonly known as leeches.

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