Fish & Fishing

A fish is a water-dwelling vertebrate with
gills that doesn''t change form, as amphibians do, during its life. Most are
cold-blooded, though some (such as some species of tuna and shark) are
warm-blooded. There are over 29,000 species of fish, making them the most
diverse group of vertebrates. Fishing is the activity of hunting for fish.
Fishing is a very ancient practice that dates back at least to the Mesolithic
period which began about 10,000 years ago.

Fishing is the activity of hunting for fish.
By extension, the term fishing is also applied to hunting for other aquatic
animals such as various types of shellfish as well as squid, octopus, turtles,
frogs and some edible marine invertebrates. Fish as a food describes the edible
parts of water-dwelling, cold-blooded vertebrates with gills, as well as certain
other water-dwelling animals such as mollusks, crustaceans, and shellfish. An
aquarium (plural aquariums or aquaria) is a vivarium, usually contained in a
clear-sided container (typically constructed of glass or high-strength plastic)
in which water-dwelling plants and animals (usually fish, and sometimes
invertebrates, as well as amphibians, marine mammals, and reptiles) are kept in
captivity, often for public display; or it is an establishment featuring such
displays. A detailed guide of everything you want and need to know about fish.