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Special adaptation
The skeleton of sharks, as bezżuchowców skeleton is made of cartilage. Sharks do not have bladder pławnego and had stopped to swim, opadłyby to the bottom. Representatives of some species of sharks spend most of their time at the bottom of the sea...
The types of sharks
Długoszpar, or basking shark, is found in the waters of the north Atlantic. Although it is one of the largest sharks, reaching 14 meters in length and weight 4 tons, is completely niegroźny. It is pelagic fish and flies from a wide open mouth, grabbing the plankton...
Propagation
Adult sea minogi live in the sea and there are even found at a depth of 1000 m. Like most species of animals minogów they are held dwuśrodowiskowymi and spawning in rivers. Their tarliska may be far from the sea, in the upper course of the river, where he reached after several days of comprehensive migration...
Nutrition
Adult forms of most species are parasites minogów. Przytwierdzają to the bodies of larger fish up to 2 years, during which time they feed on the tissues. When minogi przysysają to the victim's body, her skin ząbkami nacinają and divert pieces of food...
Attacks on humans
Some species of sharks are called ludojadami. These include, inter alia, tope white. These large predators are relatively scarce...