"Use the zoo wall that is pre-set in the game for an exhibit. It doesn't crumble and you can save money." - girl4ladybugs

"Whale sharks and manta rays like to be in the same tank as each other. If you start with the kids park ( I think thats the name) you start with a zoo already. So you buy a lot of animals. Dinos, marine, and original zoo animals." - wmb-6

"If your mermaids aren't happy, try putting a couple of thouse clam statues on the bottem of their exibit. Mine love them (i have 2 clams for each of them). i also put a couple of treasure chests there too." - Rae♥

"when animals say that there is no room then add another exhibit next 2 it and then delete the wall in the middle and then change the terrain and then they love it[bonus tip if the zookeepers say that there is more shelters than needed then ignore them or your animals will not be happy and if you want orcas to eat guests then make a massive tank then place as many orcas as you can then you love how one of the loved animals will become a real killer" - crypto 137