What college major do I choose to be a Marine Mammal Trainer?

I'm a junior in high school, and I reallllly need to start looking at colleges but I dont know what major to choose that has to do with what I want to do. I want to be a Marine Mammal Trainer, but I dont know what major to look at for that. I get emails from colleges and when they ask what major im interested in, tey have that as a choice, but they dont offer it at that school, so i looked it up online, and its not a real major. I was thinking Marine Biology, but im not sure. Can anyone help me?