Aquariums

Aquariums are special enclosures for sea animals: a small one (size 2) and a large one (size 5). You may build one of each, at 2 money per space, even with Build on side I. Each must be next to at least 1 water space, and its water icon counts as water in your zoo. Most sea animals can only live in aquariums; a card's tokens may be split across both, and some also need an adjacent rock space.