The Fish Is An Animal Which Subsist In Water.

Fish have scales and fins

Fish have scales and fins. Fish are arctic blooded animals. Fish is an important food source, to human beings. Fish pull out oxygen from water by using their gills.

Fish are able to eat a wide variety of food. The food is ingested through the mouth and is broken up in the esophagus. Further digestion takes place in the stomach. This digested food is processed in pouches named pyloric caeca. These are cylinder shaped pouches which secretes enzymes and take up nutrients. More enzymes and various chemicals are additional as the food moves through the digestive system. Read more Garageportbner.

The final part of digestion is done by the {intestines|bowels|guts|innards|as well as the absorption.

All sea animals including fish release their nitrogenous wastes as ammonia. The blue whale is the chief fish.

Some fish are ornamental and rather colorful. Compared with other vertebrates, fish have undersized brains relative to body size. Fish too like other animals experience from diseases and parasites.

Fish is an important source of protein for human beings. The fish named fugu has to be prepared by a licensed fugu chef, who has approved the national examination in Japan, because it has a dangerous dose of tetrodotoxin in its internal organs and could be poisoned if not prepared correctly.

Out of all fish the dolphin is supposed to be the most intelligent fish. There are lots of records where dolphins are said to have helped human beings in deep sea, what time they were in danger.

Fish can be divided into two main groups, as salt water fish and fresh water fish. Fresh water fish live in rivers, lakes and other water bodies with fresh water. Of all type of fish 41% are of fresh water. Read more Facadebeklaedning.

The shortest lived fish is the seven figure Pygmy goby and its life extent is 59 days at most. All fish have ears, but it is said that fish cannot hear very well.

Fish have color vision as good as humans. Fish can sense gentle currents and vibrations, and can sense the motion of nearby fish and prey, through the lateral line system that is formed from responsive receptors. Read more Laserskaering.

Cat fish and sharks can detect low level electric current. They have particular organs for this purpose. The electric eel can create electric current.

William Tavolga has done much research and experiment and as a result has discovered that fish have pain and fright responses. He experimented with toadfish and electrically shocked the fish grunted and thereafter at the sight of an electrode they began to grunt.

by: Farid

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