The Great Blue Whale
The great blue whale may be observed in the St. Lawrence River from May to June, but has a greater presence in August and September. It is the largest of all the whale species. It is a “sea mammal” that can exceed 30 metres in length and could weigh between 80 to 100 tons. It is the largest known living animal on the planet.
The long thin body of the blue whale can take on different shades of bluish-gray on its back, with a little lighter colour of blue on the underside.
There are at least three distinct sub-species of blue whales; those living in both the North Atlantic and North Pacific; those living in the Antarctic Ocean; and those living in the Indian Ocean and the Southern Pacific Ocean.
Like the majority of whales, the blue whale feeds mainly on krill, a small crustacean, but also has been known to devour fish and squid.
There were thousands of blue whales in all of the oceans before the beginning of the 20th century, but the blue whale was almost hunted to extinction for its oil, used to fuel the industrial revolution, before being protected by the International Community in 1966. Today the species is still considered to be threatened.