What fish can live with Pearl Danio?

Use the "Often compatible" lists as a shortlist, not a stocking plan. Always run the pair tool and check the footprint of your actual tank first. Verify behaviour for Pearl Danio against your own reading before you buy.

What tank mates should you avoid with Pearl Danio?

Avoid Oscar, Angelfish, Discus based on size, temperament, or predation risk on file.

What size tank do Pearl Danio need for a community?

80L is the planning floor for adult swimming space and bioload headroom. Long-term, a 98L+ tank lets adults use the full footprint without crowding the next species. Footprint, meaning length and front-to-back depth, matters as much as raw volume for active or territorial species.

Pearl Danio tank mates

A fast-moving 6 cm schooler with a pearl iridescence. Hardy and peaceful but needs open swim space and a long tank for natural behaviour.

Evidence: partially verified

Confidence: high

Lists below are built from this species record (safest, best with, risky, unsafe) — each link opens a pair-level check, not a guarantee.

← Full Pearl Danio profile·Compatibility checker·Tank builder·More barb

Best tank mates (on file)

Merged from conservative safest and best with fields — de-duplicated by species.

Corydoras Catfish Pair check
The Pearl Danio profile lists Corydoras Catfish as both safe and a recommended pairing. Corydoras Catfish schools in groups of 6 or more, so plan room for the whole group rather than one fish. Corydoras Catfish swims in the bottom zone while Pearl Danio stays in the top, so the two will not crowd the same water column.
Harlequin Rasbora Pair check
The Pearl Danio profile lists Harlequin Rasbora as both safe and a recommended pairing. Harlequin Rasbora schools in groups of 6 or more, so plan room for the whole group rather than one fish.
White Cloud Mountain Minnow Pair check
The Pearl Danio profile lists White Cloud Mountain Minnow as both safe and a recommended pairing. White Cloud Mountain Minnow schools in groups of 6 or more, so plan room for the whole group rather than one fish.
Zebra Danio Pair check
The Pearl Danio profile lists Zebra Danio as both safe and a recommended pairing. Zebra Danio schools in groups of 6 or more, so plan room for the whole group rather than one fish.

Risky or situational

From risky tank mates and broad avoid with (excluding “unsafe” below). May work with species-only setups, more water, or mature systems — read the pair page.

None on file beyond the safe list.

Fish to avoid with Pearl Danio

From the unsafe list — predation, aggression, or space rules on this profile.

Oscar See why (pair)
Oscar reaches 35cm and is flagged predatory. Pearl Danio at 6cm is prey-sized for it. Oscar needs at least 300L, far above the 80L minimum for Pearl Danio. The tank that houses one stresses the other. Oscar is rated aggressive and Pearl Danio is rated peaceful. No community-style planning carries that gap.
Angelfish See why (pair)
Angelfish reaches 20cm and is flagged predatory. Pearl Danio at 6cm is prey-sized for it.
Discus See why (pair)
Discus needs at least 200L, far above the 80L minimum for Pearl Danio. The tank that houses one stresses the other.

Tank size and groups

Published minimum for Pearl Danio: 80L — group minimum 6 (schooling).
Compatibility changes when the tank is too short for turning, too little for a real school, or too warm for one species and not the other — that is why pair checks include tank context, not only temperament.
Nearest litre hub to this minimum: 80L hub.

Plan before you buy

Pair checks for every mix, then multi-species stocking in the builder.

Open compatibility checker Tank builder

Filtration & heating

A 80L minimum tank for Pearl Danio needs a filter rated for at least 320L/hr turnover and a heater maintaining 18–26°C.

Filter buying guide →Heater buying guide →Beginner plants guide →

Related (care + temperament)

Other species that list Pearl Danio

Reverse lookup: these profiles reference Pearl Danio under safe or “best with” lists.

Hillstream Loach tank mates