two tariffs
There are 2 separate tarifs, one for the Acquarium and then you have to pay again to go to the zoo.
The animals are bright, aware, and seem to be well-fed (compared to the Frankfurt zoo, where pelicans are stuffed with hay and the Washington Zoo, where ostriches have to eat the same thing) and they are allowed to observe and interact with the visitors.
In some zoos the animals hide in their houses and lie in their cages and do not pay attention to the people who come to visit the zoo.