Can fancy goldfish live with yoyo loaches?

Verdict

No. Fancy goldfish and yoyo loaches should not share a tank. Fancy goldfish are coldwater animals (65–74°F); yoyo loaches need 75–86°F. No temperature suits both.

Fancy goldfish65–74°F · pH 7–8

Yoyo loach75–86°F · pH 6–7.5

What to watch

Deal breakerFancy goldfish are coldwater animals (65–74°F); yoyo loaches need 75–86°F. No temperature suits both.
Deal breakerYoyo loaches nip fins, and the long fins of fancy goldfish are an easy target.

What works

pH 7–7.5 suits both.

Water side by side

The ranges do not meet, so one of them would always be too warm or too cold.

The green band is the pH both tolerate.

Size to scale

Adult length in an aquarium. A fish can swallow anything that fits in its mouth, roughly a third to half its own length for predators.

Care at a glance

	Fancy goldfish	Yoyo loach
Temperature	65–74 °F	75–86 °F
pH	7–8	6–7.5
Adult size	6.0 in	5.0 in
Minimum tank	30 gal	40 gal
Temperament	Peaceful	Semi-aggressive
Swims at	All levels	Bottom
Group	Alone or in pairs	Groups of 5+
Diet	Omnivore	Omnivore

Better tank mates for fancy goldfish

All fancy goldfish tank mates

Better tank mates for yoyo loaches

All yoyo loach tank mates

Questions

Can fancy goldfish live with yoyo loaches?

No. Fancy goldfish and yoyo loaches should not share a tank. Fancy goldfish are coldwater animals (65–74°F); yoyo loaches need 75–86°F. No temperature suits both.

What temperature suits both fancy goldfish and yoyo loaches?

None. Fancy goldfish need 65–74 °F and yoyo loaches need 75–86 °F, so the ranges do not meet.

What size tank do fancy goldfish and yoyo loaches need together?

At least 40 gal, set by the yoyo loach. Add space for each extra fish.