Fish

Fish become one of the basic staples of food or become a side dish at lunchtime dinner. Sebahagian people have become a habit when going to dinner or lunch always need fish as a complement to food. But do we know what is a fish?.

In the opinion of some people, they say that the fish are vertebrates (vertebrates) that live in water and are systematically placed on a Chordata Phylum with the characteristics of having gills that function to take dissolved oxygen from water and fins used for swimming. Fish can almost be found in almost every type of water in the world with a variety of characters and shapes.

Fish live in two different water spots ie sea water fish and saltwater fish. Their seawater lives in a loose seas with its water content in salt, while its shape and character vary from the largest to the smallest. Likewise freshwater fish they live in rivers or estuaries whose moisture content does not contain much salt or is called in fresh water. Freshwater fish are also very many types, shapes, and different characters.

Experts say that almost every fish to survive and breed must be able to adapt to its environment. Environmental conditions that affect the life of fish include physical and chemical conditions such as salinity, depth, brightness, temperature, flow rate, and bottom waters. Fish has a high adaptation pattern to environmental conditions, both on physical factors and environmental chemical factors such as pH, DO, brightness, temperature, and so forth. This is very important not only to get food, but also to save yourself from predatory animals that come from their neighborhood.