Some species of whale do have teeth. These specific toothed whales belong to a group of marine mammals called cetaceans, which include such animals as the oceanic dolphin, porpoise, beluga and narwhal.
The teeth of cetaceans are not specialized, meaning that they do not have the different kinds of teeth that other mammals, such as humans, possess. Rather, all of cetaceans' teeth are uniform and roughly the same size, usually appearing conically shaped with a single point. Cetaceans also only have one set of teeth to last their entire life and do not grow new replacements if one falls out. Different species have varying amounts of teeth. For example, dolphins can have up to 40 pairs of teeth while beaked whales only have two.