My answer: You may all think that a moving being as long as one particular lighthouse would be impossible to be kept in captivity, but it has! A grey whale has at SeaWorld San Diego, not for entertainment, though! This animal was orphaned. It was in 1997, to be precise. It was rehalibilited for 14 months. 8 years before that, a 5,000 pounds Bryde's Whale was having round-the-clock care. Also, in Japan, there have been several, succesful attempts to house baleen whales.