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Definition
| Organisms living suspended in the water column and incapable of moving against water currents |
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| Belonging to the order Copepoda; the largest group of crustaceans in the zooplankton |
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Definition
| The photosynthesizing organisms residing in the plankton |
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Definition
| Belonging to the group Euphausiacea; shrimplike crustacea, up to a few centimeters long; zooplankton, found usually in upwelling regions |
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Definition
| Animal members of the plankton |
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Definition
| Jellyfish belonging to the Cnidarian class Scyphozoa |
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Definition
| Organisms that spend part of their time in the plankton but also spend time in the benthos (e.g., planktonic larvae of benthic invertebrates) |
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Definition
| A group of specialized hydrozoan cnidarians, consisting of large planktonic polymorphic colonies |
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Definition
| Organisms spending all their life in the water column and not on or in the seabed. |
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| Members of the phylum Ctenophora, a group of gelatinous forms feeding on smaller zooplankton. |
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Definition
| Planktonic organisms associated with the air-water interface |
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Definition
| A group of pelagic tunicates (phylum Urochordata), either colonial or solitary, with buccal and atrial siphons on opposite sides of the body |
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Definition
| Refers to plankton that have a float protruding above the sea surface, such as the Portuguese man-of-war |
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Definition
| Members of the phylum Chaetognatha, a group of planktonic carnivors |
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Definition
| At low velocities, the frictional force on a spherical body moving through a fluid at constant velocity is equal to 6π times the product of the velocity, the fluid viscosity, and the radius of the sphere; smaller organisms denser than seawater sink with a constant terminal velocity proportional to organismal volume |
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Definition
| Group of holoplanktonic gastropods |
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Definition
| Dominant planktonic algal form with siliceous test, occurring as a single cell or as a chain of cells |
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Definition
| Class Polychaeta; annelids characterized by paired parapodia, which are used for locomotion |
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Definition
| Dominant planktonic algal form, occurring as a single cell, often biflagellate |
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Definition
| Group of protistans characterized by a ciliated surface for locomotion and often a ciliated mouth |
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Definition
| Phylum Chrysophyta; unicellular, usually nanoplanktonic phytoplankton; secrete a skeleton consisting of caldium carbonate plates and are sporadically dominant |
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Definition
| Protozoan group, individuals of which usually secrete a calcareous test; both planktonic and benthic representatives |
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Definition
| A gropu of photosynthetic and nitrogen-fixing bacteria that live as a single cell or chain |
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Definition
| Protistan phylum whose members are planktonic and secrete an often elaborate siliceous test |
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