One of the killer whales is Orka and the good whales are the Blue whales and the Grey whales, but they are only some of them. Whales are warm-blooded animals. All whales give birth to live young. Whales swim with the rear fin. Within the group, they are aggressive only in stressful situations such as lack of food or in captivity.In normal contacts, they behave politely and peacefully.

People usually threaten whales. Natural enemies of whales are just species of big sharks and other whales such as Orkas that attack small whales and cubs of large whales. Until the twentieth century, there are two species which had been completely destroyed: Atlantic grey whale and Korean grey whale.

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Tekst pripremile: Đurđica Fruk, Eva Horvat

Ana Poljak Klarić, prof. engleskog jezika