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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

Dangerous dwellers of the Mediterranean sea

Upon closer inspection, the monster turned out to be some third-rate, fit only to frighten their young children. In a word, to the Maldives with their tropical abundance of all poisonous reptiles our sea obviously does not hold. However, read it and was horrified. It turns out that affectionate and warm Mediterranean sea just teeming with all sorts of creatures, ready to grab the tender, defenseless body of the swimmer, to wrest from it a piece of meat to poison or, at worst, a painful sting.

However, in 15 years of searching for adventure and snorkeling the biggest trouble that happened to us, is hopelessly corrupt bottoms, on which “spit” ink a startled octopus out of water.

The main principle for anyone wanting to dive into the sea plain and simple, as a rake: “I don’t know – don’t touch” . The more dangerous animals and the more troubles it can cause the bather, the careless behaves closer and admit to myself, naively believing that everyone is familiar with her bad temper and will not touch.
If you sobiratelnitsa on wild stony beaches, to the main principle “don’t touch anything” it would be good to add another special Slippers . no sea urchin is not terrible. Continue reading

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