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Minute organisms that float or swim on surface water or on a surface film of water.



the organisms that attach themselves to the surface film of water and move on either the top of the film (supraneuston) or the underside (infraneuston). The neuston includes protozoans, unicellular algae, water striders, Gyrinidae (whirligig beetles), gnat larvae, some Cladocera (water fleas), Pulmonata, and other small, for the most part freshwater, organisms. The marine infraneuston also includes inhabitants of the top of the water (0–5 cm), which occupy that region at all times or only at night (small crustaceans, fish fry).

References in periodicals archive ?
Atka mackerel larvae are neustonic after hatching (Kendall and Dunn, 1985) and have large mouths (Gorbunova, 1962) capable of feeding on larger plank-tonic prey.
Neustonic species accounted for four of the five most common prey taxa.
This frontal area, the transition zone chlorophyll front (TZCF), is an area of concentrated phytoplankton that also collects and attracts a variety of neustonic and oceanic organisms--many of which may be potential prey times, as well as predators, of oceanic-stage loggerhead sea turtles in the Pacific.
Heteropods are found in the upper photic zone (within 100 m of the surface) but are not typically a neustonic or floating species.
Community structure of neustonic zooplankton in the northern California Current in relation to oceanographic conditions, 22 p.
Neustonic ichthyoplankton in the northern region of the California Current ecosystem.
Oceanographic associations of neustonic larval and juvenile fishes and Dungeness crab megalopae off Oregon.
Larvae 9 to 11 mm eat copepods and chaetognaths; larvae >11 mm eat exclusively neustonic fish larvae.
Remnant jaws and heavy pigmentation of many of the fishes eaten, indicated that most were neustonic.