| Fish is a kind of animals that lives and respires in | | | | poisons or pollutants in the slime that ward off the |
| water. They are vertebrates in nature and breathe | | | | attacking living things whilst others make use of their |
| through their gills which contain fins and scales. Fish | | | | slime in giving food to their young. |
| constitute almost half of known species of | | | | Fish have diet also; they eat insect larvae, |
| vertebrates. | | | | crustaceans, worms, algae, eggs of fish, terrestrial |
| An ichthyologist is a person who studies about fish. | | | | insects, water birds, turtles, mice and others.Fish are |
| Fish are identified through their scale counts, colors, | | | | eaten by other fish, birds (like herons, pelicans and |
| general features, amount of fins and character, | | | | cormorants), snakes, turtles, crustaceans, dragonfly |
| maximum measurement lengthwise and distribution. In | | | | larvae and human beings. In some parts of the |
| some groups, males and females have diverse | | | | universe, there are also some animals like wild cats, |
| shaped bodies or different colors; in other groups or | | | | wild bears and pigs that eat fish. |
| species there are no visible dissimilarities. | | | | Freshwater fish lives in all kinds of environments: |
| Several fish contain lungs and can breathe air, but | | | | rivers, streams, springs, lakes, lagoons, land, |
| most of them respire through their gills. As water | | | | billabongs, swamps, estuaries, backwaters, dune |
| goes by the fish, liquefied oxygen is engrossed in the | | | | lakes, reservoirs, drains and ponds. Several |
| blood, and also in waste goods like carbon dioxide | | | | freshwater fish as well spend portion of their manner |
| that pass out in the water. The thin pieces of tissue | | | | of living at the sea. |
| which are supplied richly with blood constitute the gills | | | | The following are some varieties of fish: |
| of fish. The gills well sheltered by big bony plate | | | | Anabantids - they are the fishes which belong in the |
| known as operculum. | | | | families of Anabantidae Belontiidae, Helostomatidae |
| Lateral line is a paddle scales which most fish contain | | | | and Osphronemidae. These are called "labyrinth fish" |
| beside their sides, elongating starting from the head | | | | because of the supplementary breathing organ |
| up to the tail. Beneath these scales, we can find a | | | | known as "labyrinth". |
| scheme canals filled with fluids and particular cells that | | | | Catfishes - they are identified through the barbells |
| transmit sensations into the brain. Objects including | | | | surrounding their mouths that permit them to look |
| prey and predators are detected with the help of | | | | for food in gloomy situations. As replacement for |
| lateral line. | | | | scales, the skin can be covered by bony plates. |
| You will observe that fish are slimy; this is because of | | | | Types of catfish are Cory, Whiptail and Plecto. |
| the mucus that is secreted in the skin. This coating | | | | Characins - most characins generate by means of |
| that is slimy is important since it gives protection | | | | egg-scattering. Tetra, Pacu and Hatchet fish are |
| from diseases and parasites. The coating also covers | | | | some kinds of characins. |
| wounds to avoid infection and aid fish to move | | | | Cichlids - the colors, sizes and shapes of these are |
| faster through the water. Some species discharge | | | | very huge. Angelfish is one type of this fish. |