What types of cetaceans (whales and dolphins) have been successfully bred in captivity?
Depends what you mean successfully, technically none, as very few (none) are ever released so there is no purpose for breeding just to be in a tank. But the majority of marine mammals which are in captivity will breed, from killer whales, to pilot whales to bottle nose dolphins and manatees. After all dolphins are one of the only other creatures aside from humans that have sex for pleasure not just to reproduce. Also in captivity they probably have little to do so reproduce a lot, the zoos also get money and awards plus attract more visitors from baby animals so zoos like to encourage reproduction.
