Also found in: Dictionary, Medical, Wikipedia.


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 ?
Nevertheless, the impact of latitudinal differences on the functions of the neuston in the fragmentation and transport of organic matter to greater depths is not fully understood (Zaitsev, 2005; Koski et al, 2007).
Larvae were collected from the eastern Bering Sea to northern California, using neuston nets, bongo nets, and Tucker trawls, from January to September, with peak abundance in May.
Thirty-two samples were collected using a modified David neuston net (David, 1965), with a catamaran frame sustaining a 4 m long net of 333 [micro]m mesh size, and a 30 x 15 cm rectangular mouth opening.
Taxonomic composition and distribution of Euphausiacea and Decapoda (Crustacea) in the neuston of the Bay of Fundy, Canada, J.
Megalopae in the surface were sampled from a small boat (6 m) by holding a dip net (36 cm x 36 cm X 2-mm-mesh; equivalent to a neuston net) just below the water surface and pushing it through the center of a front for 2.
A life zone, however, is what students found when they cast a special net called a neuston tow into the open ocean.
Terrestrial and freshwater invertebrates in the neuston of the Bay of Fundy, Canada.
By contrast, the central region of the eastern tropical Pacific (ETP) has been sampled extensively during surface tows with neuston nets, yielding higher densities of paralarvae (Ueynagi and Nonaka, 1993; Vecchione, 1999).
La abundancia de copepodos en todas las muestras y su predominio en superficies rugosas, coincide con lo senalado por Shanks (2002), quien indica que los organismos holoplanctonicos (como copepodos) no se encuentran normalmente en el neuston, pero ocasionalmente se concentran en superficies rugosas ubicadas entre slicks, generados por ondas internas, lo cual sugiere que su afloramiento es causado por corrientes ascendentes generadas en el borde posterior de las ondas internas.
Although other researchers have reported success with collecting Hermatobates in neuston tows run during both daylight and nighttime hours (Cheng and Schmitt, 1982), many of our specimens were instead taken by visual searching and hand netting on exposed reef flats at low tide during the day.
Florida anglers often notice schooling mullet apparently "gulping air," but dedicated mullet fans in England believe they're actually feeding on tiny phytoplankton from the neuston layer, which is the top few centimeters of water.
Summer distribution of pontellid copepods in the neuston of the eastern Gulf of Mexico continental shelf.