Animals

A predatory tyrannosaur. Instead of building dinosaur nests, it lays its eggs in trios, allowing for three young ones instead of one to hatch at a time. Its young can hunt in packs. Be warned, as adults may resort to cannibalism out of desperation if their hunger reaches an extreme threshold.

A ceratopsian. Its babies hatch extremely small and use different enrichment items from their parents due to their small size. They are also much easier to contain.

The largest turtle known to have existed. Exceptionally long-lived, it will take quite some time to die of old age in your zoos.

A large extinct shark that develops quickly. It grows to sizes exceeding those of the great white shark. Cretoxyrhina mantelli is also known by its common name, the Ginsu shark. 

A basal alligatoroid. It has an intense rivalry with the Albertosaurus. If they are placed in the same exhibit, they may even duel each other! It can also rampage.

A brainy troodontid. Despite its small size, it is capable of rampaging, so be careful not to draw its ire.