aquatic
Sea, river and lake fish
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
The food chain, Sea
“Natural systems” – Global. The continents and oceans. Zonal natural complexes. Savannah. The natural areas. Climate. Taiga. Major. The lower part of the atmosphere. Flora. The Arctic desert. “Component”-in translation from Latin means “a constituent part of a whole”. J. Lamarck. Mixed and wide kristenye forest. The whole biosphere.
“Diversity of organisms” – Plants. HOMEWORK: PREPARE FOR WRITTEN TEST EXAMINATION OF THE ENTRIES IN THE NOTEBOOK. 2. Aquatic environment (fish, shellfish, seaweed, whales, jellyfish, etc.). Viruses. 4. Land-air-water (waterfowl, dragonflies, mosquitoes, etc.). 3. Terrestrial-aquatic (amphibians, crocodiles, marine turtles, etc.).
“Habitat” organisms – Each organism adapted to life in a particular environment. Environment – the conditions surrounding the organism. Distinguish between land– air, water and soil environment. Adaptations of plants. Well developed organs: root, stem, leaves, etc. Adaptations for pollination: bright color of flowers, the fragrance of Fixtures to maintain moisture. Continue reading
About aquarium fish
Breeding aquarium fish has long ceased to be a children’s hobby or adult hobby. Keep an aquarium at home or at work nice and prestigious. Design of aquariums and their internal design are astonishingly varied, so you can select a model that will fit into any decor and meets Your aesthetic needs.
The world of aquarium fish is incredibly versatile, in addition it involves a lot of interesting facts . some of them You can learn by watching their Pets.
For example, catfish lovers know that sometimes these fish are floating belly up. For catfish – shapeshifters this is not a sign of poor health, for them this is normal. In addition, there are nagging catfish using pectoral fins and the swim bladder emits a croaking or creaking sounds.
Very interesting fish is a fish-knife or otherwise known as apteronotus belamimovie. It does not have pectoral and dorsal fin, but the anal fin she deftly floats back and forth. Fish often fight and lose body parts, but fear not, apteronotus well developed tissue regeneration. Note that the fish likes night lifestyle. Continue reading
