Fishes belong to the group of “cold-blooded” animals. This means that their body temperatures changes, as the ambient temperatures changes. Some of it like the tuna and the white shark can hold a higher cold temperature. These animals can be found in every aquatic environments. From mountain streams to the deepest point of the oceans.
Starfish, Jellyfish, Crayfish, Shellfish, although we consider all of these as fishes they are not. Dolphins and whales are not fish too. In aquaculture the true fish are referred as fin fish to distinguish them from all of these other animals. Most of the fresh water fish extract oxygen from the air. They extract oxygen from the water as well using a lots of different structures. The fish bodies have a lots of shapes. Many of them have an un-fish shapes, such as seahorses, angler fish, gulpers, and puffer fish. The diversity of fish is divided between oceanic and freshwater ecosystems. The largest basins with freshwater fish are Congo, Amazon and Mekong basins.
Although fishes can’t live without water there are some who can stay on dry up to several days. These kind of fish can breathe air via a number of mechanisms. Some of them can breathe through their skin, some can breathe through their digestive tracts.
These are the reasons we find fish interesting animals and decided to bring you some of the most beautiful species in the world.