Scarlet Badis
Dario dario
Also known as: Bengal Badis, Scarlet dario, Scarlet Dario
Tiny Indian badid with iridescent blue bars and big personality in a nano tank.

About
The scarlet dario (Dario dario) is a miniature badid from northern India, native to clear, vegetation-rich streams in the Brahmaputra drainage where aquatic plants like Vallisneria and Hygrophila crowd sandy, gravel-bottomed shallows. Males are immediately recognizable by seven iridescent blue vertical bars running along bright reddish flanks. A combination that makes this one of the more visually rewarding nano fish you can keep. Females are notably plainer and more subdued in color. Despite their small size, males are assertive toward each other and need room to carve out individual territories. In tighter quarters, a single pair works best; in more spacious setups, a group can coexist if caves and sight-breaks are spread out rather than clustered together. The species is gentle toward dissimilar fish but can be easily bullied or outcompeted at feeding time, so rowdy or larger tankmates are a poor match. Being a carnivore that often hesitates at dry foods, it does best when offered live or frozen invertebrates regularly. Breeding follows a substrate-spawning pattern where the male guards eggs scattered on the underside of leaves and takes on all parental duties after spawning. The fry are tiny and need infusoria-grade food early on, so raising them successfully takes some planning. A rewarding species for the keeper who takes the time to set up the tank around its needs.
Similar species
Other fish you might consider
Good tank mates
Species that tend to coexist peacefully with Scarlet Badis
From the same region
Share the same natural habitat. Great for a biotope-themed tank
Frequently asked questions
- How big does the Scarlet Badis get?
- The Scarlet Badis reaches about 0.5–1" as an adult.
- What size tank does the Scarlet Badis need?
- A minimum of 11 gallons is recommended for the Scarlet Badis.
- What water parameters does the Scarlet Badis need?
- The Scarlet Badis does best with a temperature of 64–79°F, a pH of 6.3–8.5, hardness around 1–20 dGH.
- Is the Scarlet Badis aggressive?
- The Scarlet Badis is generally peaceful and suits a community tank with similarly calm tankmates.
- What does the Scarlet Badis eat?
- The Scarlet Badis is a carnivore. It needs a meaty, protein-rich diet of frozen or live foods.
- How long does the Scarlet Badis live?
- With good care, the Scarlet Badis typically lives 3-6 years.