Goldfish tank mates
Carassius auratus
3 rated pairings from the Goldfish care guide. Compatibility here means water, temperament, tank zone and adult size all line up — the note on each card says why. Goldfish needs at least 50 gallons on its own; every companion adds to that.
Good matches
3 · Compatible with normal care — watch space and numbers.Gold Mystery Snail
Pomacea bridgesii
5 gal min · 2" adult · Peaceful
Peaceful snail that helps with algae control; goldfish may occasionally harass but snails can retreat into shells
Ramshorn Snail
Planorbarius corneus
5 gal min · 0.75" adult · Peaceful
Hardy snail that tolerates goldfish behavior; helps maintain tank cleanliness without competing for food
Nerite Snail
Neritina natalensis
5 gal min · 1" adult · Peaceful
Durable snail with hard shell; excellent algae eater that coexists peacefully with goldfish
Also recommended alongside Goldfish
Species whose own guides list Goldfish as a tank mate.
Dense Waterweed
Egeria densa
Axolotl
Ambystoma mexicanum
20 gal min · 10" adult · Peaceful
African Dwarf Frog
Hymenochirus boettgeri
5 gal min · 1.5" adult · Peaceful
African Clawed Frog
Xenopus laevis
15 gal min · 5" adult · Predatory
Fontinalis Antipyretica
Fontinalis antipyretica
Koi
Cyprinus rubrofuscus
250 gal min · 24" adult · Peaceful
Spotted Gar
Lepisosteus oculatus
75 gal min · 24" adult · Aggressive
Weeping Willow
Salix babylonica
Planning this tank?
Run the whole stock list through the calculator — it checks bioload and schooling numbers, not just pairings.