North American catfish thronging fishes of the Kuban
North American catfish, introduced 30 years ago in Krasnodar region, thronging fish-natives, including our native European catfish. American channel catfish was brought in a fish farm of the Krasnodar territory…

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Black tuna (Thunnus atlanticus)
Black tuna is a small predatory fish in the scombridae family. Has the smallest size among all species of tuna: a maximum of 100 cm in length (average 50 cm)…

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Nitrogen metabolism in the aquarium
Nitrogen metabolism in the aquarium: (1) Forage (2) NH 3 . (3) NO 2 . (4) NO 3 . (5) H 2 O. (6) Lighting, (7) Fertilizer (8) O 2…

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WHY sharks rarely get sick?

Powerful, swift, and deadly rulers of the seas – sharks – can cause conflicting emotions, people.

Primal fear, and sometimes disgust in an incredible way combined with admiration and a desire to learn, understand and… to get acquainted with the graceful and unpredictable of predators.

How ironic that a death threat stirs our interest and stirs the imagination, forcing to closely monitor the movements of sharks, at each moment trying to predict her behavior. Apparently, this “unhealthy” interest was inherited from distant ancestors, whose lives depended on careful observation of a dangerous predator, from studying his habits and habits.

But not only ancient instincts prompt the person to study this wonderful work of nature. The shark is a unique example of sustainability. Continue reading

Amazing creatures of the seas and oceans

1. Spotted dolphins . Bahamas. The comment of the photographer: “Night of spotted dolphins swim from the shores of the Small Bahamian banks in the deep water of the Gulf stream in search of food. One night the ship’s captain, Jim Abernethy, she noticed a small group of dolphins swimming near the bow of the ship. We silenced the engine, turned on the lights and jumped into the water. Using manual focus mode, and the flash, I was able to make this unusual frame”. (Andrew Sallmon / Nature’s Best Photography)

2. “This baby is one of many that environmentalists on a remote beach on Costa Rica’s help to get to the ocean. Leatherback turtle – a rare species in the Eastern waters of the Pacific ocean, and it’s a symbol of hope for the future of this species,” says photographer Jason Bradley. (Jason Bradley / Nature’s Best Photography Continue reading

Predatory fish Piranhas

Piranha — all species of freshwater fish of the family of tetras that live in the rivers and reservoirs of South America. The word “piranha” has its roots from the language of the Tupi Indians, it comes from the words “Pira” (fish) and “the wounded” (saw). ( 11 photos )

1. Long piranha reaches 80 cm, and its weight can reach 1 kg. piranha is Generally a pretty big fish, olive-silvery with purple or red tint. On the edge of the caudal fin has a sharp black border.

2. Young piranha silvery color, sides with black spots, ventral and anal fins are reddish or yellowish. Piranhas have very powerful jaws and very sharp teeth, such a structure allows the piranhas to come out of the production of large pieces of meat. Of course we all know that piranha representative of the family of predatory fish. Continue reading

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Amazing creatures of the seas and oceans
1. Spotted dolphins . Bahamas. The comment of the photographer: "Night of spotted dolphins swim from the shores of the Small Bahamian banks in the deep water of the Gulf…

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Sea hare: fish from the Pacific ocean
Description fish-rabbit Sea hares are most common in the Western Pacific, the Mediterranean and the tropical waters of the Indian ocean. They have a medium size and oval body, flattened…

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