Please take this as an honest question: as a vegetarian and someone with likely above average empathy for animals, don't you feel uneasy about keeping fish in acquariums?

I eat meat so I'm not claiming any moral ground, on the contrary I very much keep in high esteem people who avoid animal products, but the idea of keeping a living creature in a tiny living space feels incredibly sad to me, and it seems surprising that someone like you would do it.