I mean, up to 500 (!) penguins in capitivity in one enclosure?
It's the same as for Flamingos. I think if someone does it right there could be a really awesome big Enclosure with such a big Penguin Colony. They do also live in extremely big Groups in Real Life. I assume no Zoo really keeps that many Penguins. Maybe Frontier did it like that so they won't become already unhappy when there are 25 in the Enclosure but still enough Space.
Walkable enclosures for these (?), never seen any IRL.
At least Emperor Penguins (I assume it's very similar for King Penguins) are very curious and often walk up to People (at least that's how they behave in the Wild when they see Tourists)
(Still, the front-runner is the walkable habitat for the very shy Okapis.)
I agree that some Walk trough Choices are really bad and unrealistic. Really? Pronghorns? Once I've researched for only a few Minutes and already found out that this will either end in extremely stressed Animals, impaled Guests or both
Where are the (fake) nesting options/ boxes, which can be found in IRL zoos
Aren't they only for smaller Penguin Species that really breed in small Caves? Is the Breeding Behavior of King Penguins in Captivity different to what it is like in the Wild?
Penguins and seals are not fed via underwater feeders or platters IRL but by hand to control health and to make sure that every animal gets enough (including regular medicine, which is hidden in the fish)
I assume if they would implement realistic Penguin Feeding in the Game it would consume Way too much Time, so maybe at least the normal feeding is like that so the Zookeeper don't need a Eternity to feed every Penguin in the Enclosure. But this could be awesome for the Educator (do they feed them like this? I've only tested the Educator with the Wolf yet and there they just throw the Food on the Ground of the Enclosure

)
Plastic duckies as enrichment item, which could be swallowed by the animals IRL?
At least compared to the female Grey Seal, these Rubber Ducks look very big, so I assume it's ok due to the Size (didn't look at it compared to the male yet). I've just looked at my cute Screenshot again and these Ducks are really huge, so you shouldn't need to worry about them. The real Danger are Guests. Some Zoos showcase which kind of Stuff they already needed to remove per Operation because stupid People thought it would be a good Idea to throw it in.
Why do penguins have no molt animation?
I think this would be awesome. But our Camels and Bisons also don't grow a thicker Coat which I assume is either due to no real Seasons for some Reason (please Frontier add Seasons. It isn't 30°C all the Time here and then it randomly starts snowing in August. It wouldn't even need to be implemented for everyone. A Option would be possible to choose if you want real Seasons or want to stay with the current Model) or maybe it's a bit hard to implement
Completely agree. The whole these "animals need so much space because conservation" argument is actually starting to get on my nerves. Like if you wanna push the message that animals can't/shouldn't actually be kept in normal zoos 'cause they need waaay more space than any realistic zoo can offer them, then maybe you shouldn't have created a ZOO game in the first place and went with a wildlife reserve simulator instead.
There is so much other Stuff that is required to keep Polar Bears, so I'm also mad that Frontier did it like this. Maybe we have at least a slight Chance that they will make it more realistic now that some Animals have a Depth Requirement. But hopefully no required Water Depth of 10m