e females are generally larger than the males, this is the case for all baleen whales. "The largest specimen found was a female 94 feet (29m) long weighing more than 174 tons" (Satchell 1998). The head of the Blue whale forms up to a quarter of the total body length. Compared with other rorquals, the head is very broad. The blue whale heart is the size of a small car and can pump almost 10 tons of blood throughout the body. They have a very small, falcate (sickle-shaped) dorsal fin that is located near the fluke, or tail. Blue whales have long, thin flippers 8 feet (2.4m) long and flukes that are 25feet (7.6m) wide.
             The blue whale's skin is usually blue-gray with white-gray spots. The underbelly has brown, yellow, or gray specks. During the winter, in cold waters, diatoms stick to the underbelly, giving it a yellow to silver- to sulfur-colored sheen; giving the blue whale its nick-name of "sulfur bottoms". Other names include Sibbald's Rorqual and Great Northern Rorqual.
             Blue whales (like all baleen whales) are s
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