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.
Amphibians are vertebrate animals that live both in water and on land. Frogs, toads and salamanders are examples of amphibians. Amphibians are able to respire through their skin, and the young of all species of amphibians begin life with gills in the water. Keep Learning.