The Canadian dollar (symbol : $ ; code: CAD) is the currency of Canada. It is abbreviated with the dollar sign $ , or sometimes C$ to distinguish it from other dollar-denominated currencies. It is divided into 100 cents.
14. View. comments. The sperm whale is able to hold its breath underwater for up to 90 minutes because of a unique protein in its blood, an international team of scientists has discovered. The huge mammal will often dive up to 3km deep under water for more than an hour in search of food.
These whales have strong sphincter muscles surrounding their blowhole in order to prevent water from coming in and filling their lungs, which could cause these marine mammals to drown. During deep dives the blue whale can hold its breath for up to 90 minutes before resurfacing for air, however most dives usually last less than 30 minutes.