We know that the shark is a perfect killing machine. Its body has changed little in thousands of years because its design is virtually unbeatable. But we could say that the ability to kill could be improved if it were a warm-blooded fish, thus increasing muscle capacity, and decreasing your reaction time.
To nature, evolution, or whatever you want to call it, has already created a shark so called salmon shark or Lamna ditropis. This still being a fish, is warm-blooded, maintaining a temperature of between 21 º.
I personally reminds me of a big tuna. It has a compact, strong body, pointed snout and flat, with large eyes and a large mouth full of sharp teeth. It is dark gray on the back and whitish belly. On the side is pinkish characteristic traits that make it and have earned it the name of Salmon Shark.
They can measure over 3 meters (9 ft.), and some witnesses say they have seen specimens of up to 4.5 meters (15 ft.) and 550 kg (1220 lb).
Dispatched by both Eastern North Pacific and Western. And a funny thing happens here that experts have not yet been able to explain. In the eastern regions are the females who maintain control over groups of sharks, however, in the western regions, the male domination is almost copies.