Well, in their day they didn't have a lot of information, didn't they?
Fish are living things. They need to be taken care of. Every animal is worth the same, no matter how big or small or the amount of years they live to. Dogs and cats are not "superior" to fish- every animal has a soul, and that is what makes them equal.
Heck- if, let's say, your child came down with the flu or something, you wouldn't flush them down the toilet (or throw them into the orphanage, whatever) and adopt another one. You would manually take care of him/her. Same goes for fish. If you say "oh betta fish don't need a lot- they can live in bowls without food and no heater" that's basically saying "oh, children don't need a lot- they can live in dinky bathrooms with no food and no clothes" in my eyes.
Sergio- Green-blue metallic HM. Red/white/green fins and green iridescence.
Comet- Silver-blue metallic HMPK piebald dragonscale. Red/silver-blue/black/??? fins.
Neptune- Koi/marble delta tail.Translucent fins dappled with orange and black. You'll be missed.
Indigo- Purple veiltail. Purple fins with some red and white at the tips. S.I.P., buddy.