An Illustrated and Cross-Referenced Glossary of
Malacological and Conchological Terms

by Paul S. Mikkelsen

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Term Definition

DEVELOPMENT, PLANKTONIC   Having a free-swimming or floating larval stage; see also: DEVELOPMENT, DIRECT; LECITHOTROPHIC; PLANKTOTROPHIC, PLANKTON.
   

PLANKTONIC   Floating or suspended in the water column, and generally incapable of overcoming the currents by swimming although some directional movement is possible, usually vertical; see also: BENTHIC; PLANTIGRADE.
   


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