different type of fish

Fish is a member of the paraphyletic group of organisms. This consists of gill-bearing aquatic craniates animals with limbs and digits. Most of the fishes are hagfish, cartilaginous, bony fish and lampreys. Fishes are ectothermic, which means cold-blooded. Fish are abundant in most of the bodies of water. Fishes are an important resource for humans worldwide, especially as food because it consists of a lot of minerals, vitamins, and proteins as it stays in water bodies. These are served as religious symbols.

They breathe through the gills, which serves the same function as our lungs. Bony fishes have only a single gill. Fish has a closed-loop circulatory system. They are an omnivorous group because they feed on plants and other small sea animals of water bodies. Fishes excrete nitrogenous and ammonia. Fishes reproduce highly in the open water column only. The eggs have an average diameter of one millimetre only.

fish swimming mode

 

 Animals with two tails 

The early bird gets two tails? A 120-million-year-old bird sported a long tail and a second, unexpected tail frond, paleontologists suggest. The discovery points to a complicated evolutionary path for the tails we see in birds today.

One of the oldest known birds, Jeholornis, lived in what is today China, along with a trove of other feathered dinosaurs discovered in the region over the last decade. It was also thought to sport only a long fan-feathered tail at its back end. Now, however, paleontologists are claiming discovery of a second tail frond adorning the bird. (See "Did Feathered Dinosaurs Shake Their Tail Feathers?")

"The 'two-tail' plumage of Jeholornis is unique," according to the study, which was led by Jingmai O’Connor of the Chinese Academy of Sciences in Beijing. The report of the discovery of the tail frond was published in the Proceedings of the National Academy of Sciences.

Animals with two tails and have the ability to live inside water 

A water animal is a vertebrate or invertebrate animal that lives in water for a certain time or all of its life. Many insects, such as mosquitoes, dragonflies and caddis flies, begin their life cycle as water larvae before they turn into winged Checkout interesting animals that live in water.

Water animals can breathe air or receive oxygen dissolved in water with the help of specialized organs called gills, or directly through the skin. The natural conditions and animals that live in them can be divided into two main categories: water or land. Checkout pictures of animals that live in water.

video show how they survive.