The fluctuating temperatures in the core depend on pressure, the rotation of the Earth, and the varying composition of core elements. In general, temperatures range from about 4,400Â° Celsius (7,952Â° Fahrenheit) to about 6,000Â° Celsius (10,800Â° Fahrenheit).
Baleen whale (suborder Mysticeti), also called toothless whale, any cetacean possessing unique epidermal modifications of the mouth called baleen, which is used to filter food from water. Baleen whales seek out concentrations of small planktonic animals. The whales then open their mouth and take in enormous quantities of water. When the mouth is closed, they squeeze the water out through the sides, catching the tiny prey on the baleenâs bristles. (See also cetacean: Feeding adaptations).
Six species of baleen whales are found in Antarctica, including the huge blue whale which is the largest animal that has ever lived. It grows up to 24 metres and can weigh 84 tonnes. Other baleen species are the fin, southern right whale, sei, minke and humpback. Four species of toothed whales are found in Antarctica. Except for the sperm whale, they are much smaller than the baleen whales and weren't widely hunted. The other species are the southern bottlenose whale, the orca whale and the southern fourtooth whale.