Compared to cats and dogs, fish do have a couple of undeniable drawback as pets. You can’t really play fetch with them or take them on walks, and while there’s nothing physically stopping you from holding a goldfish on your lap and petting it, the sight of it desperately flopping around makes it far less relaxing than petting a purring kitty.
That’s not to say fish don’t have anything going for them. For example, they’re far less likely to pee on the sofa or cough up a hairball than a dog or cat. Plus, since they live in the confined space of a tank of water, you can create amazing scenery for them, like these amazing artistic aquariums.