Whale

Toothed or Baleen: Whales can be divided into two groups — baleen and toothed. Baleen whales, like the humpback, blue, minke and right, take large amounts of water into their huge mouths and sift out plankton through 130 to 140 baleen plates located on each side of the upper jaw. Toothed whales have simple conical teeth within a beak-like mouth as seen in the dolphin. This group mainly feeds on fish.

Giants of the Deep: Baleen whales are known for their size, which ranges from 21 feet to 110 feet long. Toothed whales tend to be smaller. A notable exception is the toothed sperm whale, which can reach a size of 59 feet long. Toothed whales also have a melon-shaped structure located near their foreheads, which is believed to be used as an echolocation device for locating prey.