The razor-toothed piranhas of the genera Serrasalmus and Pygocentrus are the most ferocious freshwater fish in the world.
Agriculture yields 40% of the global food production under irrigation on 20% of the cultivated land, using about 70% of all freshwater withdrawals.
Any of various minute single-celled freshwater organisms of the genus Euglena, characterized by the presence of chlorophyll, a reddish eyespot, and a single anterior flagellum.
But once the ice retreats and the permafrost thaws, heavy winds, waves, and freshwater currents can pummel the islands from all directions, making them rounder and smaller than in other environments.
The freshwater sweat then evaporates and condensates into dew on wall of the greenhouse and is collected in a freshwater tank.
Malta produces only about 20% of its food needs, has limited freshwater supplies, and has no domestic energy sources.
Any of various primitive elongated freshwater or anadromous fishes of the family Petromyzontidae, characteristically having a jawless sucking mouth with rasping teeth.
The endangered Cooloola sedge frog (Litoria cooloolensis) is part of the rare group of acid frogs—so named because they find refuge in naturally acidic waters, including Fraser's freshwater lakes.
A new freshwater species is a refreshing discovery in a region plagued by pollution and development.
"The findings basically said that eels don't need freshwater habitat to survive, " Watts said, throwing up his hands in exasperation.
These are the animals chosen for the mission: Lynx, Fox, Wolf, Wolverine, Mouse, Pike (a freshwater fish), and dogfish (a kind of small shark — dogfish is a funny name for a shark, isn't it?)
They haunt shallow waters like bays and estuaries worldwide-and some species even ascend freshwater rivers.
Instead, it secretes a glue and USES this to stick bits of sand together to form its casing, in the way that a freshwater caddis fly larva does.
A freshwater food and game fish(Stizostedium vitreum)of North America, having large staring eyes.
That means it might represent a stage of gradual evolution of turtles from freshwater to the sea, and the study of its ecology can help to understand the evolution of Marine turtles.
The delicate white tufa towers formed where freshwater springs percolate up from the bottom of the lake.
The natural salinity of the ocean will draw the freshwater out, retaining the plants and nutrients.
The head and eye of a freshwater shrimp, observed by Jose R. Almodovar of the Microscopy Center, Biology Department, UPR Mayaguez Campus, in Mayaguez, Puerto Rico.
The existing projects, though, are looking at freshwater algae.
This involves tapping both freshwater and seawater at the mouths of Norway’s many rivers and fjords, and diverting it to tanks on either side of a semi-permeable membrane.
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