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).
Types of Baleen Whales and Anatomy. Early baleen whales started appearing about 30 million years ago [source: Carwardine et al. ]. Now, there are 11 types of baleen whales divided into four different families: 1  Family Eschrichtiidae, which is just the gray whale. 2  Family Balaenopoteridae, which includes the humpback, blue, fin, sei, Bryde's and minke whales. 3  These whales are also known as rorqual whales.