I am not too sure about this question but I THINK they can tell because blue whales are much bigger than other whales.
whalers are its name
it used to be whalers but hunting them has been baned
Because they want to make money for the bones and meat.
the difference is the whale is bigger
a blue wheel is a 4 stroke and a minkie whale is a 2 stroke. you only have to stroke the blue whale 4 times before it blows its load.
the largest of the two is the blue whale. it is the largest mammal and is also the largest whale, whereas the killer whale is less than a quarter of the size and weight and is among the smaller variations to the whale family.
killer whales eat fish where as blue whales eat mostly krill.
The average size of a blue whale's brain is the largest among all marine mammals.
The blue whale is a baleen whale.
Blue Whale
The blue whale. Technically the whale shark isn't acually a whale, but in fact the worlds largest fish (shark). The blue whale, also happens to be the largest animal (mammal) on the planet.The blue whale is nearly twice the size of the whale shark, to 90 feet or more.
The blue whale is the fastest, the sperm whale is not far behind and the right whale is the slowest. The blue whale would be the only one with a well defined fin (a dorsal fin) on it's back. A sperm whale (like all toothed whales and dolphins) has a single blowhole at an angle on the top/front part of its head, so it has a single blow that comes up at an angle. A right whale (like all baleen whales) has a double blowhole on the top of its head. It has a double blow. A blue whale, even though it also has a double blowhole has a high and straight blow. There are several good field guide books that show the difference between the blows of different types of whales.