they train them of course
none
im pretty sure more than 500,000,000 dolphins
Recent studies show that the survival rate of infant dolphins in the wild is 75%. In zoos and in aquariums, the survival rate is 86%.
500
There are 180 zoos in all of America, all 50 states.
umm... NONE! unless you're talking about tigers in zoos...
Dolphins are like us they are mamals so one baby at a time
dolphins can live in both rivers and seas, they are quite common in unpolluted areas but the most likely places to find them are in marine parks and zoos, or in dolphin experiences such as swimming with dolphins :)
DoDo birds are extinct (hence the name "DoDo")
150 zoos in california
Three zoos