Just kidding, that game was impossible... I don't think I even realized I was a dolphin until 5 days after I gave up and was like "Hah... I was a dolphin".
If anyone still has that game they should go to gamefaqs and actually figure out how to beat it. That game bugged me for months before I gave up and went on a dolphin killing spree. I'm still the most wanted man at Seaworld.
I only rented the first one. The second one was better, and I still remember the cheat to do pretty much anything in the game.. Pause, ABCBCACAB.
I hated the "fly up in the sky on some sort of hovering water" levels, but I think the worst level was the one where you had to put the spinning ball-DNA guy back together.. always had trouble finding the last two balls.