Although the terms reactant and reagent are often used interchangeably, a reactant is more specifically a substance that is consumed in the course of a chemical reaction. Solvents, although they are involved in the reaction, are usually not referred to as reactants.
Animals that live in water, usually called aquatic animals, include fish, cetaceans, certain types of turtles and other reptiles, and amphibians. There are also a number of semiaquatic animals, such as alligators, hippopotamuses and penguins, that depend on and live in water most of the time. Continue Reading.
The European water vole or northern water vole, Arvicola amphibius (formerly A. terrestris), is a semi-aquatic rodent. It is often informally called the water rat, although it only superficially resembles a true rat.s a large and common microtine rodent, the range of predators faced by the European water vole is truly daunting. However, many species of predator prefer other rodents, such as Microtus voles and wood mice, due to their greater numerical abundance.