species

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The underwater ocean world of giant predatory fish.

The shark with the Latin name is Galeocerdo cuvier biologists determined in 1822, and from that time she was nicknamed the tiger shark. These sharks got their name due to the dark stripes and spots that cover the body of the “minors” of this species. Also in this title to show all the cruelty that is inherent in the shark, which is the second most deadly shark after the great white.

It should be noted that the tiger shark is a part of the family Carcharhinidae Requiem sharks. Despite its reputation, this predator also got another nickname: “sea scavenger” or “scavenger of the sea”.

It turns out that the tiger shark can eat anything from sea turtles and seals, which constitute the bulk of its diet, to more exotic kinds of “food” – rubber tires, beer bottles, nails, a driver’s license, clothes, explosives, crocodile heads, cats, pigs, and even pens, with all their inhabitants (there were precedents). In Australia, for example, was caught tiger shark with a whole and intact head of the horse in the stomach!

Why the tiger shark is called tiger?

So who are these deadly and eternally hungry predators? To begin with, what is this species different from other sharks? Well, as we already mentioned, for shark’s distinctive “tiger” colour, which is most noticeable in young specimens. Tiger sharks have a white or yellowish belly, the rest of the body is painted in cool colors range from bluish-green to dark gray.

At birth these predators have a length of from 50 to 70 centimeters. They grow much larger. An adult tiger shark can reach 4 meters in length and weighing around 680 pounds. Some individuals can grow up to 5 meters and weight gain up to 900 pounds. Continue reading

The water temperature for aquarium fish

Have you ever wondered why different fish need different temperature? And what is the impact on them of the discrepancy? And how they are sensitive to changes? Quick changes in temperature aquarium fish suffer badly, this is one reason, from which newly purchased fish die. To fish accustomed, they need to acclimatize.

Simply put, the higher the water temperature, the faster fish grow, but also age faster. We have collected some of the frequent questions about the temperature for aquarium fish and tried to answer them in an accessible form.

Fish cold-blooded?

Yes, their body temperature depends on the ambient temperature. Only a few fish, for example, some catfishes, can modify body temperature, and even sharks maintain a body temperature several degrees higher than the temperature of the water.

This means that the water temperature directly affects fish?

Water temperature affects the rate of physiological processes in the body of the fish. For example, in winter, the fish of our ponds are inactive, because the metabolism drops significantly in cold water.

At high temperatures, the water holds fewer dissolved oxygen, and fish is very important. That is why in the summer we often see how the fish rise to the surface and breathing hard.

Bystryanskaya temperature aquarium fish suffer badly, this is one reason, from which newly purchased fish die. To fish accustomed, they need to acclimatize. Continue reading

How to grow coral reef in a saltwater aquarium

The aquarium except marine fish are also produced and corals called reef marine aquarium. Fast-growing corals – usually of the genus Montipora, Acropora, Pocillopora and grow in the aquarium polyp for polyp until until grows a micro-reef.

Light for corals

The word “micro-reef” very often means just a small marine reef aquarium. Coral planting in artificial conditions requires intense lighting, which is rather expensive. Therefore, the smaller the size of aquarium, the less need for coverage, the cheaper it costs.

The need for intensive lighting because the light having the wavelength required for photosynthesis, passing through the water, fades with increasing depth. For illumination with a sufficient intensity of a small light bulb aquarium requires lower power than for lighting large. Besides that they consume less electricity they are also cheaper. Another their advantage is that they are less likely to heat the water. When the aquarium light should know that excessive light is as harmful to corals as weak.

Sea current in the aquarium

A saltwater aquarium requires water circulation. Motion credif places natural growth of coral reefs is very strong. Currents, tides provide a powerful turbulent motion of sea water, which cleanses the mucus from corals, sediments and rock fragments. At the same time it provides the coral with nutrients and oxygen. Therefore, the circulation of water in marine aquariums is essential. Unfortunately, you know it’s not all aquarists. Continue reading

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