Medaka tank mates
Oryzias latipes
6 rated pairings from the Medaka care guide. Compatibility here means water, temperament, tank zone and adult size all line up — the note on each card says why. Medaka needs at least 10 gallons on its own; every companion adds to that.
Excellent matches
5 · Same water, complementary zones, no conflict.
Endler's Livebearer
Poecilia wingei
10 gal min · 1.5" adult · Peaceful
Similar size, peaceful temperament, and compatible water parameters make them ideal companions
Neon Tetra
Paracheirodon innesi
10 gal min · 1.5" adult · Peaceful
Small, peaceful schooling fish with identical water temperature and care requirements
Otocinclus
Otocinclus vittatus
10 gal min · 1.5" adult · Peaceful
Small, peaceful algae-eating fish that thrive in the same cool to moderate temperatures
Dwarf Hairgrass
Eleocharis parvula
Foreground plant that provides spawning substrate and shelter for medaka fry
Nerite Snail
Neritina natalensis
5 gal min · 1" adult · Peaceful
Peaceful algae-eater that won't compete with medaka and helps maintain tank cleanliness
Good matches
1 · Compatible with normal care — watch space and numbers.
Also recommended alongside Medaka
Species whose own guides list Medaka as a tank mate.
Planning this tank?
Run the whole stock list through the calculator — it checks bioload and schooling numbers, not just pairings.