Catfish – fish is very useful for those who first starts the aquarium. They are known for their ability to eat up leftover food and thus help clean the aquarium. In addition, these fish are hardy and live long enough.
However, you need to keep in mind that catfish today there are so many. And they differ in their way of life and type of food.
These fish live in nature in almost all continents and in all oceans, with the exception, perhaps, are the only areas of the poles.
The majority of the specimens of this species in the aquarium live in the lower layers of water closer to the bottom. There they hide and feed.
The body color of the fish is not bright, this is due to the natural need of concealment. They near the mouth opening there are antennae that gave the second name of this species (fish the cat).
But the size they can be different. From very small that will easily fit in any aquarium, to a huge that can decorate a pool. Therefore, buying a catfish, to accurately determine, not whether it will be a couple of months too big for the aquarium. Continue reading
We all know that water is life. Without water can’t live no living creature. And the first life originated in water. Fish one of the many live organisms living in the aquatic environment. They live in the oceans and seas, rivers and lakes. You can see them in the pond and the stream, in the waters of caves and even in puddles. In nature, there are over 25,000 species of fish, and they are divided into two classes: Bony fish (more than 23 000 species); Cartilaginous fishes (9000 species).
To the class of cartilaginous fish include sharks, rays and chimeras. To the class of bony fish include salmon. okuneobraznyh. preobrazenie. clupeiformes. Cypriniformes, catfishes, wildcookie, flatfish, coloscopie.
Fish are cold blooded vertebrates. their streamlined body covered with scales. They breathe with gills, and with the help of fins and tail to swim. Water entering the body through the mouth, passes through the gills, and spilling over her holes. Oxygen enters the bloodstream of fish through the thin membrane of the gills. Do fish have paired fins (pectoral and abdominal), which are located on the sides and unpaired, located on the median vertical plane of the body (back, tail, and anal). Fins help fish to steer, brake, accelerate and keep the balance. Continue reading
One of the most remarkable inmates of the depths. Her look is so not attractive, and bizarre. As a rule, fish-drop lives at depths of 600-800 meters. There were also instances that prefer more extreme depths, namely 1,200 meters.
Prefer to live off the coast of Australia and Tasmania.
This fish is endangered. It is very actively caught and sold by fishermen. Of course, not palatability attract customers, and its unusual appearance.
The fish-drops no muscles, it is composed entirely of a gelatinous mass which density is close to water. It is this anatomical feature allows fish to swim at great depths without spending a large amount of energy.
This fish eats everything that floats by. Generally, its diet consists of molluscs and various.
2. Sea urchin
Some of the oldest animals. They inhabit the Earth more than 500 million years. Today there are about a thousand species of sea urchins. They are divided into two large groups, called: right and wrong. Continue reading