I was upset to see no sunfish or sawfish. But the list is still good. Hate to be a copy cat, but here are my opinions on the animals.
Orca - Good
Bottlenose Dolphin - Good. And three varients!
False Killer Whale - Not sure if that black whale in the trailer movie thing was a pilot whale or f. k. whale.
Beluga - Sounds Good
Narwhal - Not exactly realistic but sounds good. Will be fun to mix with belugas.
Short Finned Pilot Whale - Same with f. k. whale. Sounds interesting.
California Sea Lion - Good
Pacific Walrus - Good. I saw a pic of it performing in a show. It was waving to the show hostess.
Southern Sea Otter - Looked kinda big in the pic.
West Indian Manatee - Looks light in color and a bit odd, but should be good.
Blacktip Reef Shark - Kinda small, but looks good.
Scalloped Hammerhead Shark - Good. Almost evil looking.
Great White Shark - Half and half on this. Kinda looks like a tiger shark.
Whale Shark - Oh joy!
Goblin Shark - Kinda 50/50 again, but actually kinda excited about it.
Manta Ray - Good
Blue Marlin - Wouldn't it hit it's long nose into the tank walls?
Green Sea Turtle - Looks kinda cute.
I could just hug it. Three varients also!
Leatherback Turtle - Looks kinda funky from above. (In the very first pics of MM, you can see it peeping out of the water. I personally think we'd be fine with only one turtle species.)
Rockhopper Penguin - Good. And the baby is so cute.
I'm eager to see what the pilot whale/false killer whale, whale shark, goblin shark, and marlin look like in-game!