how big is the mouth of a blue whale
Blue whale Due to its large size, several organs of the blue whale are the largest in the animal kingdom. A blue whale's tongue weighs around 2.7 tonnes (3.0 short tons)[39] and, when fully expanded, its mouth is large enough to hold up to 90 tonnes (99 short tons) of food and water.[8] Despite the size of its mouth, the dimensions of its throat are such that a blue whale cannot swallow an object wider than a beach ball.[40] The heart of an average sized blue whale weighs 400 pounds (180 kg) and is the largest known in any animal.[41] During the first seven months of its life, a blue whale calf drinks approximately 380 litres (100 US gal) of milk every day. Blue whale calves gain weight quickly, as much as 90 kilograms (200 lb) every 24 hours. Even at birth, they weigh up to 2,700 kilograms (5,950 lb)—the same as a fully grown hippopotamus.[3] Blue whales have proportionally small brains, only about 6.92 kilograms (15.26 lb), about 0.007% of its body weight,[42] although with a highly convoluted cerebral cortex.[33] The blue whale penis is the largest penis of any living organism[43] and also set the Guinness World Record as the longest of any animal's.[44] The reported average length varies but is usually mentioned to have an average length of 2.4 to 3.0 m (8 to 10 ft).[45]