As of now, there are approximately 30 accredited zoos and aquariums in the United States that house dolphins. These facilities typically participate in conservation and educational programs. The most notable among them include marine parks and aquariums like SeaWorld and the Georgia Aquarium. However, the number can vary as institutions change their animal care policies and accreditation status.
they train them of course
none
im pretty sure more than 500,000,000 dolphins
500
umm... NONE! unless you're talking about tigers in zoos...
There are 180 zoos in all of America, all 50 states.
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
20 zoos are in kansas