Ok when my sim Lindsay went to China she bought a few fish and when she came back they were all gone
Has anyone else got this problem?Please i really want to bring home international fish!

I think that's a bug that came with Pets and its patch. The only things you can do is to either use twallan's ErrorTrap, which fixes this, or place the spawners for these fish in your homeworld. They can be found under buydebug and unlike the insect spawners work in every world.

Yeah i tried that and i went to China twice just to get those fish -_-
Thanks anyways,It worked but the fish died days later -_-
I really hope they fix it!