I feel so stupid now. I was watching The Ultimate Guide to Dolphins to see them show freshwater dolphins and found out that orcas are the largest type of dolphins. And all these years I thought they were small toothed whales. I know dolphins are in the same family as whales, but I thought orcas were actually whales. It looks like beluga whales are dolphins too, which I say because they showed a bunch of different types of dolphins all together with one looking like a beluga, but I didn't finish watching the show to find out. I'll watch the whole show later today.