Gold Ring Danio (Brachydanio tinwini)

The Gold Ring Danio (Brachydanio tinwini) is a little Burmese stream fish that looks like someone press-stamped rows of dark spots into a bar of polished gold. Each spot sits inside a warm golden ring, and in a moving school the effect is a rippling grid of light. It stays right around an inch, never stops swimming, and it is one of the genuinely easy nano fish: hardy, adaptable, peaceful, and happy across a wide temperature range. Browse the rest of our freshwater livestock and supplies to round out the tank.

Happy Without a Heater

This is one of the few attractive nano fish that genuinely does not need a heater in most homes. Wild tinwini live in hill streams that run from the mid 60s into the upper 70s, so anything from 64 to 79°F suits them. If your room stays reasonably steady, an unheated ten or twenty gallon works fine. They will still do well in a warmer community tank, they simply do not require one.

Care Guide

• Buy them in numbers. Eight is the minimum, ten or more is better. Danios kept in twos and threes get nervous, chase each other, and lose their color. A real school spreads the energy out and settles the whole group down.
• Tank size: 10 gallons for a starter school, 20 gallons long or larger for a big group. These are tireless swimmers, so floor length matters far more than height.
• Water parameters: 64 to 79°F, pH 6.5 to 7.5, soft to moderately soft water. Very tolerant, but they reward stability over chasing exact numbers.
• Aquascape: plants and driftwood around the edges with a clear lane down the middle. A gentle current suits their stream origins and gets them swimming into it.
• Feeding: micropredator with a small mouth. Quality flake and micro pellets as the staple, plus frozen baby brine shrimp, daphnia, or bloodworm a few times a week. The live and frozen food is what brings the gold up.
• Lid required. Danios are committed jumpers and this one is small enough to leave through a very narrow gap. Cover the tank and mind the cutouts behind a hang-on-back filter.
• Sexing: mature females are noticeably rounder in the belly and slightly larger. Males run slimmer and color up hardest when they are displaying.

Specifications

Compatibility

Peaceful and non-nippy, but fast. Pair them with fish that can hold their own at feeding time rather than very timid or very slow ones. Great company includes the Kubotai Rasbora, Micro Tiger Rasbora, Celestial Pearl Danio, Ember Tetra, Pygmy Cory, and Otocinclus. Cherry Shrimp and nerite snails are safe with adults.

Skip long-finned tank mates like fancy bettas and guppies, since constant fast movement stresses them out even without nipping. Also avoid anything large enough to treat a one inch fish as a snack.

Want more danio energy in the same tank? The Pearl Danio and Zebra Danio share the same easygoing, cool-tolerant profile at a slightly larger size.

Recommended Foods & Supplies

• Hikari Micro Pellets sized for small mouths
• Xtreme Community Crave Flakes krill and spirulina staple
• SFBB Baby Brine Shrimp frozen conditioning food
• Seachem Prime water conditioner for every water change
• Live plants for cover along the edges of the swimming lane

FAQ

Is this the same as a Spotted Danio?
No, though they are sold under that name constantly. The true Spotted Danio is Brachydanio nigrofasciata, which grows larger, has longer barbels, and carries a solid stripe with striped rather than spotted fins. Gold Ring Danios are smaller and their dorsal and tail fins are speckled, which is the quickest way to tell them apart.

Why is the scientific name different from what I have seen?
The species was described in 2007 as Danio tinwini and later moved into the resurrected genus Brachydanio. Both names refer to the same fish, and most retailers still use the older one.

Do they really not need a heater?
In a normal indoor room, no. They are comfortable anywhere from 64 to 79°F. If your house drops into the 50s overnight in winter, add a heater set low to keep things steady, since swings matter more than the actual number.

Are they safe with shrimp?
Adult Neocaridina, yes. Their mouths are too small to threaten a grown shrimp. Newly hatched shrimplets in an open tank will get eaten, so add moss and cover if you want a colony breeding alongside them.