The whalers harvested 506 southern minke whales and one fin whale. Cetaceans such as whales and dolphins also have internal testes. Whale oil is oil obtained from the blubber of whales. In addition, white sharks attack and prey upon beaked whales. The most notable adaptation is the development of echolocation in whales and dolphins. There are no limits on pilot whales and porpoises. The same is true of orcas and several other small whales. The baleen of baleen whales are keratinous plates. The Inuit hunted whales in the Arctic Ocean. There are currently 15 species of baleen whales. Mysticetes are also known as baleen whales. It concerns Tilikum, an orca held by SeaWorld and the controversy over captive killer whales. There are dozens of species of seals and whales along the coast. Of the 14 whales beached, six of them died. Its tail was forked, like that of whales or dugongs.