Shark catfish is a fish belonging to the family pangasius. In nature, shark catfish found in Thailand and Laos, in freshwater lakes and rivers, and in artificial channels and ducts, for which it is also called channel catfish. His Providence and breeding of economically favorable compared to many other fish, besides, she is in great demand in many countries – usually in stores such fish are sold in the form of frozen fillets, which is more known under the name of “sea language”. But shark catfish is not only a fish dish, but fish. From what we are used pangasius, which is used for food, this creature is smaller in size: if you eat mainly individuals that reach a few tens of centimeters, or even meters in length, in aquariums are bred smaller fish.
A species of shark catfish
Shark catfish as aquarium fish is divided into two varieties: Siamese pangasius and pangasius sutchi. The first is very popular among many lovers of aquarium fish because of Continue reading
Carp — cultural form of carp, bred by man in the ponds, lakes, and reservoirs. Carp are bred mainly in southern and Central Russia, Ukraine, the North Caucasus. Some species of carp were able to acclimatize in the Northern areas (near Petersburg, in Novosibirsk oblast, Krasnoyarsk Krai).
Carp have unusually wide dorsal fin at the front is equipped with a sturdy saw-tooth serrated beam. The same beam and have found podrostkovogo fin.
Carp grows quickly. By the end of the first year of life its length for about 10 cm with a weight of 25-30 g. In favorable conditions, by the end of the second year it weighs 450-500 g, and in the third year (sexual maturity) it weighs 2 kg.
Carp is very similar to carp and also how he is unpretentious: content minor content of oxygen in the water, that is not very afraid of water pollution by sewage and, most importantly, unpretentious in nutrition. A juvenile common carp feeds on plankton and benthos. Adult carp — a real “pig” among fish: it feeds on worms, insect larvae and insects, various crustaceans, molluscs, therefore, will be very useful to feed him special fish food designed for him. Continue reading
They live in shallow water, so there is a good chance to step on it. The most dangerous type is considered Vadimony hedgehog hedgehog. Its needles are very long and thin. When injected into the human body they break down and cause inflammation, which in the untimely appeal to the doctor, can be life threatening.
Act as respiratory organs pileolus — another kind of sea urchin, which lives near the shore. It is red and dark gray. It needle a length of several centimeters. They are also very fragile, and if you step on a hedgehog, the needles remain in the body.
The most dangerous lionfish family Scorpaenidae. Them hard to miss in the water: they have very bright color, and their fins resemble feathers. They are very dangerous and for the people, and for other marine animals.
Contact with the impeller can cause death. It can be found near reefs. Therefore, swimming in these places, should be especially careful to try not to step on it and stay away from its poisonous needles. They cause intense pain, the venom can lead to respiratory arrest, and in place of injury appears a large tumor. Continue reading