What is the aquarium? This is the most common type of vivarium 1. Typically the aquarium is made of glass or transparent plastic. With fish and plants, invertebrates, molluscs and plants, the aquarist creates a private area of the underwater world and supports its living state.
Previously, under the aquarium knew the dishes for storage of various liquid preparations. In a vessel put the various bottles and kegs which were stored in water. In England the term “aquarium” refers to the dishes for the maintenance of aquatic plants, but not animals. The modern concept of aquariums has been formed in the XIX century.
The General public, the aquarium was presented in 1851 at the world exhibition in London, and the term “aquarium” was proposed by the English naturalist Philip Henry Gosse in his book “the Naturalist on the coast of Devonshire”. The book enjoyed great popularity. With the release of his book “the Aquarium: Wonders of the deep sea” it has become fashionable to keep exotic tropical fish and other animals in the house.
The development of the aquarium over the next 100 years is primarily due to the understanding that the aquarium without adequate chemical and technical support can not provide a comfortable environment for fish and plants. Understanding biological and chemical processes occurring in the aquarium, helped to create a more complex aquarium filters,improved lighting systems, etc. Along with this decreased and the cost of equipment. Adequate price on aquarium equipment has made this hobby available to the majority of the population. Continue reading
A long time ago, even before dinosaurs roamed the Earth and were the first sharks that these extraterrestrial beings already inhabited the seas and oceans. They are the most ancient inhabitants of our planet . lived on Earth for another 500 to 700 million years ago.
This jellyfish is one of the most amazing, beautiful and mysterious sea creatures.
Jellyfish seem to be supernatural creatures, alien beings largely thanks to its strange forms and colors. The nature has created them according to his own, some incredible drawings: the body resembles an umbrella, or bell, sometimes the ball.
His name jellyfish has been because of the similarity with a wiggling hair-the legendary snakes of the Gorgon Medusa from Greek mythology. (Photo Animal Theory):
There are about 2000 different species of jellyfish. Some live in fresh water, others are found in seas and oceans. (Photo By The Tahoe Guy):
As already mentioned, jellyfish have lived on Earth for another 500 to 700 million years ago. This is a very long time. For example, the first dinosaurs appeared about 225 million years ago and the most ancient representatives of the sharks existed about 420-450 million years ago. (Photo Animal Theory):
The structure of a jellyfish is also incredibly: primerena they consist of 95% water, 3-4% — of salt and 1-2% — from protein. They have no heart, no eyes, no circulatory system or gills.
The Cassiopeia jellyfish, living mainly in the Mediterranean sea. (Photo Pietro Columba) Continue reading
Most of the fish for reproduction lay eggs, but there are a few species that give birth are ready fry. This, for example, the great white shark.
Mudskipper is a fish which spends the majority of his time out of the water and can “walk” on their own fins. In the gills the jumpers for a long time kept a small supply of water. They can also breathe through the pores of its wet skin.
The Stingray has more than 27,000 taste buds. Compared to him, a man almost four times less – “only” 7 000.
Most brands of lipstick contain substances included in the composition of fish scales. They give the lipstick a unique luster.
Fish lungfish can live out of water for several years. It secretes a slimy protective coating and in dry years, buries itself in the clay, sucking the air through the built-in breathing tube, which comes to the surface. Do lungfish have lungs and gills and.
Seahorses are the only fish able to swim upright.
Some fish like the white shark, can raise her body temperature to hunt in cold water.
Fish use sounds with low tones to pass messages to each other. They moan, growl, croak, mutter, hiss, whistle, creak and squeal. They crack the bones and grind their teeth. However, fish don’t have golosovatj. Continue reading