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Created with Fabric.js 1.4.5 Extraordinary Blue whales are among theloudest animals on the planet.They emit a series of pulses,groans, and moans, and it’sthought that, in good conditions,blue whales can hear each other up to 1,000miles (1,600 kilometers) away. Blue whales are a lightly mottledblue-grey, with light greyor yellow-white undersides.The yellowish ventral colouring is due to the accumulation ofdiatoms (microscopic, unicellular marine algae) in colder water, and has inspired the nickname "sulphur bottom whale". On average they're 100 feet(30 meters) long and upwards of 200 tons (181 metric tons). Sulphur bottom whale Outside voices Whales Blue Hefty eaters On average an adult blue whalecan consumes up to 3-4% oftheir own body weight in krill perday. During certain times of the year, a single adult blue whaleconsumes about 4 tons (3.6metric tons) of krill a day. Population trajectory for Southern Hemisphere blue whales From 1904 to 1967, more than 350,000 were killed by whaling fleets in the Southern Hemisphere. They finallycame under protection with the 1966 International Whaling Commission, but they've managed only a minor recovery since then. Blue whales are currently classified as endangered on the World Conservation Union (IUCN) Red List. Blue whales have been foundin every ocean of the world.Blue whales swim individually,in pairs, or in small groups.The blue whale is found mostlyin cold and temperatewaters, and it prefers deeperocean waters to coastalwaters and generally migratesto warmer temperateand tropical waters to breedand give birth. The 2,800blue whales that feed alongthe California coast makeup the largest concentration ofblue whales in the world. Blue whales are the largest animals ever known to have lived on Earth. Average lifespan is estimated at around 80 to 90 years. Between 10,000 and 15,000 blue whales are believed to still swim the world's oceans.
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