The MM animal list is great. There are only two things I would change:
I think there is alot of sharks, and sense it is rare for a white shark in zoos, I think it would have been cool that instead of the white shark we could have had a Gulper Eel, as we have no eels or snakes. Its biome would've also been Bethnic.
Also, the FKW is alright, but we could have done without it. What I really missed was seals. It would have been really nice to have at least one true seal. I think we should have had a Harp seal instead of the FKW sense we already have the Killer Whale itself, and Harp seals are famous for their cute pearl white babies.
Otherwise I love this expansion and think it is the best yet.
Edit: Also, sense there was no eels, I think a moray eel could've been included in the Tropical Fish Aquarium. But I can't complain.