Unlike the movies we watch, where there are very good characters good and bad characters are terrible, in nature, no animal is good and much less bad. Maybe us by our culture, we tend to classify among good and evil. For example, it is difficult to see how an animal "bad", a cow. But is easy to see how "bad" a tiger (as in the cartoon film Kung Fu Panda).
If you're going to sea, we usually see as "good" to dolphins and "bad" to the orcas. So possibly we head will explode when we know the Risso's dolphin(Grampus griseus). A good bad but very good ...dolphins ... bufff
These dolphins live in groups of up to 100 individuals. They are of dolphins there largest measuring up to 4 meters (14 ft) and weigh 600 kg (1430 lb). Its way of relating is very similar to the orcas, in fact even as they hunt. Orcas are also known as killer whales, because they often hunt other whales. Well, the Risso's dolphin also hunt whales, hunt whales not only inoffensive, but also other whales which are considered the world's greatest predators: the sperm whale. The sperm whale has the size and strength, Risso's dolphin has the number and intelligence.
Another thing that strikes the Calderon is using the ecolocatitation. This will help to "see" what is in the sea and to communicate with other congeners Sometimes this ecolización (not sure why) fails and leaves dozens of people stranded on beaches. Many die.
Currently, this "naughty or nice" but intelligent dolphin is endangered. Risso's dolphin is caught indiscriminately sometimes unintentionally. What is not is the cruel slaughter involuntary that make this animal each year off the coast of Denmark.