Black moor goldfish, fantail, shubunkin (calico), pearlscale and common goldfish are all hardy species that can thrive in colder water, just like comets. ... Not all goldfish will thrive with comets; avoid housing them with bubble-eye, celestial eye or telescope goldfish because they are more delicate goldfish varieties.

What fish can live with a comet goldfish?

Do comet goldfish eat other fish?

Do Goldfish Eat Other Fish? Goldfish aren't predators, so they don't attack other fish in order to eat them. However, just like the case with baby goldfish, they may swallow smaller fish when they're searching for food. Any time this happens it's not done in an aggressive manner and was purely accidental.