Dont buy glo fish
okay I know how tempting glow fish are, but the whole glowing process is done by "inserting the bioflourescent gene that makes jelly fish glow into danios to make them glow", or so they say. But what is really done, is that they coat the danios in really strong dye that is sort of neon-ish so they seem to glow,but towards the end of their lifespan or so (a few years) the dye will begin to wash off. The reason they need danios for this is because danios are extremely hardy and are practically the only fishes that can withstand being pulled out of water, coated in dye so strong it sometimes blinds them, and being dumped back into the water so they can breathe, and pulled out again a few more times for more coatings. Trust me, glo-fish may seem cool and all, but it's really just cruel.