Atkritumu fish. One dorsal fin. Pelvic fins located on the belly. In the pectoral fins and in most species the dorsal fin is spiny, often jagged rays. Non-rising mouth surrounded by tendrils. The jaws teeth. Body naked or covered with bony plates. Many have an adipose fin.
The inhabitants of the mainly tropical and subtropical freshwaters of South and Central America, Africa and Asia.
The squad consists of 20-30 families and over 1,200 species. 2 family of marine fish.
The Catfish Family – Siluridae
Body naked, elongated. Adipose fin not. The head is flattened, the mouth large, polverini. Dorsal fin short (not more than 5 rays). Anal fin long, not less than 70 rays. These freshwater and brackish-water predatory fish with spring and summer spawning. They live in fresh water in Europe and Asia, in addition to the basin of the Arctic ocean.
The family includes 8 genera, 2 of which are found in our country.
Rod Catfish – Silurus. Antennae 3 pairs. Thorn in the pectoral fin is smooth.
The genus includes 2 species.
Com S. glanis Linne, 1758. Front mandibular barbels shorter than the back. Spiny rays of the pectoral fin is strong (Fig. 110, 1). Reaches a length of 5 m. of residential Forms and the checkpoint form. These fish developed to take care of offspring. Soma build primitive nests from vegetation remnants.Inhabit the waterways of Europe: the Rhine, North to South Finland, and South to Asia Minor. Continue reading
The red sea is a unique tropical sea with a variety in beauty and in number the representatives of the underwater world. Its distinguishing feature is that it is located closest to Europe. It is not surprising that in the ports of international tourist centers of Egypt very often you can find comfortable yachts from Germany, Italy, UK, Malta, France, and other countries.
In the waters of the red sea there are over 1250 species of mammals, marine fish, corals, and other inhabitants of sea fauna.
The great Russian artist Bilibin, during his travels through the Red sea, called it “shark soup”.
Red sea, unlike other seas of the world ocean, has practically the same warm water temperature both on the surface and in depth. In the area of the Sudan at a depth of 2870 m recorded water temperature +50° C – that is truly “shark soup”.
Consider the main representatives of the red sea, which you are likely to meet. floating with a mask and snorkel, or diving on the diving:
Lionfish is a genus of marine fish squad skorpenoobraznyh. Got the name because of the numerous ray-like plumage in which there are poisonous glands. The poison in these glands is stored for a long time, even after the death of the fish.
Lionfish are a relaxed lifestyle, come out to hunt at dusk. Live in corals, caves and shallow water. Inadaptats on the hook.
Fish-urchin — sea fish living in Red sea, Indian and Pacific oceans. Named because of the presence of large numbers of spines and spikes. I live near the bottom at depths up to 150 m. fish Meat is considered poisonous. Continue reading
About the brutality of the sharks is legendary. People since ancient times afraid of sharks, because sharks of any size can be dangerous. However, among all the sharks you can highlight a dozen of the most dangerous, which can end badly.
Sharks are dangerous not only because they are strong, have sharp teeth and powerful jaws. The main danger lies in the unpredictability of the behavior of toothy predators: despite the fact that the habits of sharks are being studied for a long time, to predict with accuracy how the shark in any given situation, almost impossible.
Dangerous shark species
Today there are more than 450 species of sharks of different sizes, the smallest can reach a length of 17 cm, the biggest is up to 20 meters. But the real danger to humans represent only some species of sharks. Recent years have witnessed the most attacks on humans great white, bull and tiger sharks.
Great white shark
This shark is called “great”: in length it can reach up to 7 meters and weight up to three tons. The mere sight of this blood-thirsty predator is able to inspire terror. If you watched the movie “Jaws”, then you understand what is involved. The reputation of the great white shark is the most grim: in 2012, the year its victims were 11 people, three cases ended in the death of the victims. Continue reading