The Cove is a must see. I've been to Seaworld once as a child in San Diego. I honestly found it boring and preferred going to the beach. The idea of a circus, lion tamer, dolphin tamer... as a child I didn't get it. I always wondered why the animal didn't just kill the trainer.
There was a similar joke when I visited a zoo where there was a raccoons in a cage... ten feet from me were a family of baby raccoon scrounging in the garbage. Ridiculous.
It does make you contemplate how any parent would choose to bring a child to Seaworld after seeing this documentary.