Species › Danios, rasboras and minnows

Celestial pearl danio tank mates and minimum tank size

Danio margaritatus

Celestial pearl danios grow to 2.1 cm (0.8 in). They are shy and do best with calm tank mates of similar size. They need 20–26 °C (68–79 °F) and pH 6.5–7.5.

Minimum tank

41 L (11 US gal), at least 45 cm (18 in) long

Adult size

2.1 cm (0.8 in)

Temperature

20–26 °C (68–79 °F)

pH

pH 6.5–7.5

Group

no minimum

Celestial pearl danio minimum tank size

Celestial pearl danios need at least 41 L (11 US gal), in a tank at least 45 cm (18 in) long.

That is the largest minimum among the sources below. The planner also checks the tank length against the adult size of 2.1 cm (0.8 in): a tank shorter than 4 times that is cramped (8.4 cm (3.3 in)).

Celestial pearl danio tank mates

Each of the other 52 species in this reference, judged against celestial pearl danios by the same rules as the compatibility checker. A guide, not a guarantee.

Compatible (22)

• Black neon tetra
• Bristlenose pleco
• Bronze corydoras
• Cherry barb
• Chili rasbora
• Common pleco
• Ember tetra
• Endler's livebearer
• Glowlight tetra
• Guppy
• Harlequin rasbora
• Lemon tetra
• Neon tetra
• Nerite snail
• Otocinclus
• Panda corydoras
• Peppered corydoras
• Platy
• Pygmy corydoras
• Siamese algae eater
• White cloud mountain minnow
• Zebra danio

With care (22)

• BettaBettas are usually best kept alone. Some accept calm tank mates such as celestial pearl danios, many do not. Celestial pearl danios (2.1 cm) are shy and easily intimidated by much larger bettas (7 cm).
• Black skirt tetraCelestial pearl danios (2.1 cm) are shy and easily intimidated by much larger black skirt tetras (7.5 cm).
• Cherry shrimpCelestial pearl danios (2.1 cm) usually leave adult cherry shrimp (4 cm) alone but eat the young.
• Clown loachClown loaches nip and chase; shy celestial pearl danios are likely targets. Celestial pearl danios are shy and lose out at feeding time to boisterous clown loaches.
• Congo tetraCelestial pearl danios (2.1 cm) are shy and easily intimidated by much larger Congo tetras (8 cm).
• DiscusThe only temperature that suits both is 26 °C (79 °F), set by discus and celestial pearl danios. That leaves no margin. Celestial pearl danios (2.1 cm) are shy and easily intimidated by much larger discus (14 cm).
• Dwarf gouramiCelestial pearl danios (2.1 cm) are shy and easily intimidated by much larger dwarf gouramis (9.5 cm).
• Glass catfishCelestial pearl danios (2.1 cm) are shy and easily intimidated by much larger glass catfish (6.5 cm).
• GoldfishCelestial pearl danios are shy and lose out at feeding time to boisterous goldfish.
• Honey gouramiCelestial pearl danios (2.1 cm) are shy and easily intimidated by much larger honey gouramis (14 cm).
• KribensisCelestial pearl danios (2.1 cm) are shy and easily intimidated by much larger kribensis (11 cm).
• Kuhli loachThe only pH that suits both is pH 6.5, set by celestial pearl danios and kuhli loaches. That leaves no margin.
• MollyThe only pH that suits both is pH 7.5, set by mollies and celestial pearl danios. That leaves no margin. Celestial pearl danios (2.1 cm) are shy and easily intimidated by much larger mollies (8 cm).
• Mystery snailThe only pH that suits both is pH 7.2–7.5, set by mystery snails and celestial pearl danios. That leaves no margin.
• Paradise fishCelestial pearl danios (2.1 cm) are shy and easily intimidated by much larger paradise fish (8 cm).
• Pearl gouramiCelestial pearl danios (2.1 cm) are shy and easily intimidated by much larger pearl gouramis (12 cm).
• Red tail sharkCelestial pearl danios (2.1 cm) are shy and easily intimidated by much larger red tail sharks (13 cm).
• Rosy barbCelestial pearl danios (2.1 cm) are shy and easily intimidated by much larger rosy barbs (14 cm).
• Serpae tetraSerpae tetras nip and chase; shy celestial pearl danios are likely targets.
• SwordtailCelestial pearl danios (2.1 cm) are shy and easily intimidated by much larger swordtails (14 cm).
• Tiger barbTiger barbs nip and chase; shy celestial pearl danios are likely targets. Celestial pearl danios are shy and lose out at feeding time to boisterous tiger barbs.
• Yoyo loachYoyo loaches nip and chase; shy celestial pearl danios are likely targets. Celestial pearl danios are shy and lose out at feeding time to boisterous yoyo loaches.

Not compatible (8)

• AngelfishAngelfish grow to 15 cm and eat animals they can swallow; celestial pearl danios grow to 2.1 cm. The only temperature that suits both is 25.6–26 °C (78–79 °F), set by angelfish and celestial pearl danios. That leaves no margin. Celestial pearl danios (2.1 cm) are shy and easily intimidated by much larger angelfish (15 cm).
• Boeseman's rainbowfishBoeseman's rainbowfish need 27–30 °C (81–86 °F); celestial pearl danios need 20–26 °C (68–79 °F). No temperature suits both. Celestial pearl danios are shy and lose out at feeding time to boisterous Boeseman's rainbowfish.
• Cardinal tetraCelestial pearl danios need pH 6.5–7.5; cardinal tetras need pH 4.0–6.0. No pH suits both.
• Cockatoo dwarf cichlidCelestial pearl danios need pH 6.5–7.5; cockatoo dwarf cichlids need pH 6.0. No pH suits both. Celestial pearl danios (2.1 cm) are shy and easily intimidated by much larger cockatoo dwarf cichlids (7.5 cm).
• Convict cichlidConvict cichlids are aggressive and best kept in a tank of their own; they attack fish several times their size, so celestial pearl danios would be harassed. Convict cichlids grow to 15 cm and eat animals they can swallow; celestial pearl danios grow to 2.1 cm. Celestial pearl danios (2.1 cm) are shy and easily intimidated by much larger convict cichlids (15 cm).
• German blue ramGerman blue rams need 27–30 °C (81–86 °F); celestial pearl danios need 20–26 °C (68–79 °F). No temperature suits both. Celestial pearl danios need pH 6.5–7.5; German blue rams need pH 5.0–6.0. No pH suits both.
• OscarOscars grow to 46 cm and eat animals they can swallow; celestial pearl danios grow to 2.1 cm. Celestial pearl danios (2.1 cm) are shy and easily intimidated by much larger oscars (46 cm).
• Rummy-nose tetraCelestial pearl danios need pH 6.5–7.5; rummy-nose tetras need pH 5.5–6.0. No pH suits both.

Sources

Where sources differ, the value shown is computed as the most cautious one.

Behaviour notes are from Seriously Fish, read 2026-10-26.

Check against another species Plan a tank