Family Reference
Rasboras & Danios
Danionidae — harlequin rasboras, chili rasboras, zebra danios, pearl danios: the small cyprinids that fill the middle of a planted tank.
The Complete Rasboras & Danios Guide: Danionidae Care
Reference guide to rasboras and danios: Danionidae taxonomy, blackwater chemistry, shoaling behaviour, nano species, and aquarium husbandry.
Read the guide →Species & Profiles
All articles in this section
Why Are My Chili Rasboras Pale?
Pale chili rasboras almost always signal hard water, an undersized shoal, or a bright bare tank. Six documented causes and targeted fixes for Boraras brigittae colour loss.
Harlequin vs Chili Rasbora for Nano Tanks
Harlequin and chili rasboras are sold as nano fish but need very different tanks. A direct comparison of size, tank volume, water chemistry, biotope, and tankmate compatibility.
Why Won't My Harlequin Rasboras School?
Why harlequin rasboras don't school in a well-run aquarium — the shoaling vs schooling distinction, group size, tank dimensions, tankmates, and what chronic clustering actually signals.
Espe’s Rasbora (Trigonostigma espei): Care & ID
Field profile of Trigonostigma espei: Espe’s rasbora identification, water parameters, behaviour, diet, breeding, and common aquarium failures.
Galaxy Rasbora (Celestichthys margaritatus): CPD Care
Field profile of Celestichthys margaritatus / Danio margaritatus: galaxy rasbora or celestial pearl danio identification, water parameters, behaviour, diet.
Chili Rasbora (Boraras brigittae): Blackwater Nano Care
Field profile of Boraras brigittae: chili rasbora identification, water parameters, behaviour, diet, breeding, and common aquarium failures.
Pearl Danio (Danio albolineatus): Active Community Care
Field profile of Danio albolineatus: pearl danio identification, water parameters, behaviour, diet, breeding, and common aquarium failures.
Harlequin Rasbora (Trigonostigma heteromorpha): Care & Breeding
Field profile of Trigonostigma heteromorpha: harlequin rasbora identification, water parameters, behaviour, diet, breeding, and common aquarium failures.
Phoenix Rasbora (Boraras merah): Peat-Swamp Care
Field profile of Boraras merah: phoenix rasbora identification, water parameters, behaviour, diet, breeding, and common aquarium failures.
Leopard Danio (Danio rerio Spotted Morph): Care Guide
Field profile of Danio rerio spotted morph: leopard danio identification, water parameters, behaviour, diet, breeding, and common aquarium failures.
Scissor-Tail Rasbora (Rasbora trilineata): Care & Tank Size
Field profile of Rasbora trilineata: scissor-tail rasbora identification, water parameters, behaviour, diet, breeding, and common aquarium failures.
Glowlight Danio (Danio choprai): Myanmar Danio Care
Field profile of Danio choprai: glowlight danio identification, water parameters, behaviour, diet, breeding, and common aquarium failures.
Zebra Danio (Danio rerio): Care, Variants & Model Organism
Field profile of Danio rerio: zebra danio identification, water parameters, behaviour, diet, breeding, and common aquarium failures.
Strawberry Rasbora (Boraras naevus): Care & Identification
Field profile of Boraras naevus: strawberry rasbora identification, water parameters, behaviour, diet, breeding, and common aquarium failures.
Black-Line Rasbora (Rasbora dorsiocellata): Care & ID
Field profile of Rasbora dorsiocellata: black-line rasbora identification, water parameters, behaviour, diet, breeding, and common aquarium failures.
Mosquito Rasbora (Boraras maculatus): Soft-Water Care
Field profile of Boraras maculatus: mosquito rasbora identification, water parameters, behaviour, diet, breeding, and common aquarium failures.
White Cloud Mountain Minnow (Tanichthys albonubes): Care
Field profile of Tanichthys albonubes: white cloud mountain minnow identification, water parameters, behaviour, diet, breeding, and common aquarium failures.
Brilliant Rasbora (Rasbora borapetensis): Care Guide
Field profile of Rasbora borapetensis: brilliant rasbora identification, water parameters, behaviour, diet, breeding, and common aquarium failures.
Cherry Barb vs Rasbora Confusion: Importer ID Guide
Comparison guide separating Trigonostigma rasboras, tiny Boraras, and cherry barbs in mixed importer and shop tanks.