Within moments of its birth.
in the ocean
swim
they swim.
PEOPLE!
A blue whale will spin franticly to get the attacker off it, after it is free it will either swim away or ram the attacker against a rock wall or the ocean ground to kill it.
cold
As far as a blue whale can swim in a year
A full grown blue whale's heart is approximately the size of a Volkswagen Beetle. Their aorta is approximately 1.4 feet in width, meaning it's large enough for a human to crawl or swim through.
10000km
Between 10,000 and 25,000 blue whales are believed to still swim the world's oceans.
Blue Whales can swim at speeds up to 20 mph!
Because it can get really light so it helps the blue whale swim up for air