They do not. Although most large whales are filter feeders, those whales that do have teeth and are predatory only have a single row of teeth.
There are two types of whales; Odontoceti (toothed whales) and Mysticeti (baleen whales). Toothed whales, such as sperm whales, dolphins, and killer whales, are predators who eat fish and marine mammals like seals. They have a single blowhole and use echolocation to communicate. Baleen whales like blue whales, grey whales, and humpback whales are larger than their toothed brethren and have two blowholes. These whales have baleen plates instead of teeth to filter food like plankton and krill.
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