There are freshwater and marine fish. How do they live in the water? They breathe the oxygen dissolved in it.
Every time you open your mouth, the fish absorbs the water. The oxygen dissolved in the water absorbed inside the body of the fish straight into the bloodstream. The wastewater is then discharged through the gills, usually located on the sides of the fish’s body, behind the head.
Mudskipper is a fish with very interesting habits. There are jumpers in the Eastern Atlantic, Indian and West Pacific ocean. It lives most often in the quiet bays near river mouths. This remarkable fish that at low tide remains on land and, using fins and a special breast suction Cup, can climb trees to a height of more human growth: here it preys on insects.
In fresh water rivers and lakes inhabited by many species of fish. Freshwater fish feed on different food. Some eat algae, other aquatic insects and mollusks. Some fish eat other fish; they are real predators.
In certain types of freshwater fish are found only in one river or lake, others dwell in many places. Sometimes fish eggs is transferred to a new place, glued to the feet of waterfowl, and sometimes fish can move people. Some fish themselves swim in other rivers. When the salmon is four years old, he leaves the river and goes to sea.Having lived in the sea and two more years, he returns to lay her eggs. Many salmon return to their native river, but some moved to other rivers. Continue reading
There are on our planet, the sea of extraordinary beauty, attracting millions of tourists from all over the world for its clear water, beautiful corals and diverse fishes. It comes to the Red sea. This is one of the most beautiful places of our planet.
Why do they call it? No exact answer. Someone thinks that it got its name due to algae that in some months, the sea change colour from azure blue to red. And some prefer a more interesting explanation. According to the Bible, Moses led the Jews from Egypt to Israel through the Red sea. When they approached the shore – the water parted and exposing the bottom. It consisted entirely of canyons, cliffs and hollows. The path was very rugged and a lot of Jews died, bleeding to death. That’s why it was called the Red sea.
The red sea is a Gulf of the Indian ocean. It is situated in the deep depression, formed millions of years ago between the Arabian Peninsula and Africa. An area of almost 500 thousand square kilometers, with more than two thirds of the sea is located in tropical zone. The average water depth from 500 m to 1 km in the middle part of the sea is crack, as if dissecting it into two parts. There is a depth of 2.5 to 3 km. makes it different from other seas of our planetat that the Red sea is not no river flows. The Suez canal in the Northern part of the sea – the work of human hands, it is rather narrow, so the natural circulation of water occurs only in the southern part of the sea through the Bab-El-Mandeb.
This natural isolation has led to the fact that in the Red sea the most clear water. Usually the rivers carry their waters in the sea sand, debris and dirty water. But in this sea water is so clear that you can easily see the incredible beauty and diversity of “underwater life” of the red sea.
The absence of influent rivers has also led to the fact that sea has the most salty water among all seas on our planet. The salt concentration here is that to drown is almost impossible. It is well suited for those who decided to learn to swim and likes to swim far away (fatigue less than in the other seas). Continue reading
You go to the Black sea. Do you know what sea monsters eat? The black sea is very friendly and perfectly safe for humans. There are no scary sharks, poisonous sea snakes, Barracuda and other horrible monsters. Besides, in the sea, as on earth, just for something to do on man, no one ever attacks. And if there is in the Black sea inhabitants that can cause you a little trouble, do not grab their hands and pull the tail… kornerot jellyfish Is the largest jellyfish of the Black sea, the diameter of the dome can exceed 40cm. It is easily recognized by this fleshy, bell-like dome and a heavy beard of the mouth of the blades underneath. Lace on the blades of Camerota are poisonous stinging cells that can burn the skin, like hot water or nettles. Probably why the jellyfish has three more Russian names: sea nettles, gigalo, Zhuchka. When you see it follow the simple advice: don’t touch comerota, go around, “oblivate”. And do not touch even dead, or at least wash your hands afterwards. Otherwise, RUB their eyes and accidentally get burned. Kornerot helps to survive in the sea for juvenile fish that are hiding under his hood from the predators have feasted on those tasty little thing, but I’m afraid of stinging cells jellyfish. Himself kornerot feeds exclusively on plankton, but kornerot in the sea doesn’t eat anybody. Scientists say jellyfish to the category “food stubs”. (Although in Japan,Korea and China comerota eat: this is “crystal” meat can be boiled, fried and even salt). And here another interesting detail concerning jellyfish. It turns out that they have eyes. And the same kornerot, presumably, sees us well, although it is difficult to say in what form. However, again: jellyfish, even the most venomous itself to attack the person never will be… the Dragon is Not aggressive to man and other poisonous inhabitant of the Black sea – dragon. It is a demersal fish with a large angular head, bulging eyes and a huge, greedy mouth. Dragon usually buries itself in sand or silt, and there awaits its prey. In this case, the sand sticks out his dorsal fin, five rays of which the poisoned spines. Spikes and toxic slime from dragon are not for attack but for defense. However, accidentally stepped on has buried in the sand of a dragon, can significantly be affected: a shot of this small black sea fish is equivalent to the bite of poisonous snakes. But don’t be afraid to step on the dragon – the event is unlikely, usually the fish manages to get away from the approaching person. Much more likely to get injured dragon, the fishermen who caught it on bait. In this case it is better not to try to remove the dragon from the hook alive prick. And the sting of this fish is dangerous even after her death, therefore, to start cooking meals from dragon, remove with scissors its dangerous spikes. In taste same qualities of the sea dragon is just gorgeous, he’s a good as a holiday and in the ear. Continue reading