Blue Medaka tank mates
Oryzias latipes
6 rated pairings from the Blue Medaka care guide. Compatibility here means water, temperament, tank zone and adult size all line up — the note on each card says why. Blue Medaka needs at least 10 gallons on its own; every companion adds to that.
Excellent matches
4 · 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
Dwarf Hairgrass
Eleocharis parvula
Provides spawning substrate and cover without competing for space
Java Moss
Taxiphyllum barbieri
Provides cover, spawning sites, and helps maintain water quality
Gold Medaka
Oryzias latipes
10 gal min · 1.5" adult · Peaceful
Same species, compatible water needs, and can interbreed if desired
Good matches
2 · Compatible with normal care — watch space and numbers.
Planning this tank?
Run the whole stock list through the calculator — it checks bioload and schooling numbers, not just pairings.