Can fancy goldfish live with endlers?

Verdict

No. Fancy goldfish and endlers should not share a tank. Fancy goldfish are coldwater animals (65–74°F); endlers need 72–82°F. They overlap only at 72–74°F, the edge of both ranges.

Fancy goldfish65–74°F · pH 7–8

Endler's livebearer72–82°F · pH 7–8

What to watch

Deal breakerFancy goldfish are coldwater animals (65–74°F); endlers need 72–82°F. They overlap only at 72–74°F, the edge of both ranges.
Watch outAt 6 inches a fancy goldfish can swallow a small endler's livebearer. Fast, alert fish usually stay out of reach.

What works

pH 7–8 suits both.

Water side by side

The green band is the temperature range both can live in.

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	Endler's livebearer
Temperature	65–74 °F	72–82 °F
pH	7–8	7–8
Adult size	6.0 in	1.0 in
Minimum tank	30 gal	5 gal
Temperament	Peaceful	Peaceful
Swims at	All levels	Top
Group	Alone or in pairs	Groups of 3+
Diet	Omnivore	Omnivore

Better tank mates for fancy goldfish

All fancy goldfish tank mates

Better tank mates for endlers

All endler's livebearer tank mates

Questions

Can fancy goldfish live with endlers?

No. Fancy goldfish and endlers should not share a tank. Fancy goldfish are coldwater animals (65–74°F); endlers need 72–82°F. They overlap only at 72–74°F, the edge of both ranges.

What temperature suits both fancy goldfish and endlers?

72–74 °F. Fancy goldfish need 65–74 °F, endlers need 72–82 °F.

What size tank do fancy goldfish and endlers need together?

At least 30 gal, set by the fancy goldfish. Add space for each extra fish.