Chapter 118 The Whales

"Sperm...Sperm Whale? False Teeth?"

"That's what humans call them." Orca Takata explained, though it's unclear whether he's referring to "sperm whales" or "false teeth."

Whales are divided into toothed whales and baleen whales. As the name suggests, toothed whales are those whales with traditional cone-shaped teeth. These whales are mostly traditional predators, feeding on larger creatures.

Baleen whales, however, are different. Their teeth have completely degenerated and been replaced by the dense baleen in their mouths. Unlike teeth made of calcium phosphate, baleen is mainly composed of keratin—viewed from this perspective, baleen whale's baleen bear more resemblance to "hair."