If you're looking forward to taking your child to watch Finding Dory, or indeed, are worried for your sanity in what might end up being a children's film version of Memento, starring a forgetful fish, you need a heads-up.
Why? Well, it is common for people to watch a film that stars an animal, and promptly want to own one of their own. Easy to talk a child out of wanting to own an actual mammoth if they've seen Ice Age, but not so much with the Finding Nemo franchise.
If you're thinking of buying a tropical fish, you're going to have to do some research.
Should you offspring want to buy their own 'Dory', they're asking for a fish that is known as a blue tang.
Blue tang fish are handsome, for sure, but what people might not realise is that they can grow to the size of a truck's steering wheel. They can be gigantic, and you can't flush that down the toilet if you end up killing it.
Not only that, a lot of tropical fish are caught with dubious methods, and end up going through the black market. Basically, the fish in Finding Nemo aren't great at living in tanks in people's houses, and are better suited to being in the wild.
Tropical fish need special water, special food, aeration, and a lot of taking care of. And if you think your child is going to be vigilant in keeping tanks clean and the rest, you're most likely mistaken.
A common pet is the goldfish, but some enthusiasts say that these get too big for the tanks that are bought for them.
Either way, you're most likely to be wanting a freshwater fish, as they're cheaper to buy and easier to look after. Fish that are pretty robust when it comes to their environment are danios and barbs.
Basically, you should go down to the pet shop, or dedicated fish-related pet shop, and ask the people there. If you're buying a couple of fish, ask which ones are okay with being on their own, and indeed, about ones that like being in a school.
Have a look online to see what pet shops you have locally, and pop in, and ask some questions.