I get the research argument and would agree with it. But the habitat size is specifically designed for better viewing by the public during shows. I don't know the backstory behind this photo (I came across it during a google search), but you can see that "sea pens" offer a much larger area for the dolphins to live. As well it is in natural habitat rather than a tank with filtered water.

I'm no expert, but I imagine research could take place in a sea pen like this and Vancouver has no shortage of coastline.

http://40.media.tumblr.com/80c13240cad8e0b40c72ae7ea5a0797a/...