Rasbora Least

The Least Rasbora is one of the smallest freshwater fish available in the aquarium hobby, making it a perfect choice for nano aquariums, aquascapes, and peaceful community setups. Despite its tiny size, this charming species brings constant activity, subtle beauty, and natural schooling behaviour to the aquarium.

Featuring a delicate golden-bronze body with distinctive dark markings near the tail, Least Rasboras create a beautiful display when kept in larger groups. Their small size allows them to complement planted aquariums without overpowering the layout, making them a favourite among aquascapers and nano tank enthusiasts.

Peaceful, hardy, and easy to care for, Least Rasboras thrive in heavily planted environments where they can explore dense vegetation and open swimming areas. Their calm disposition also makes them excellent companions for dwarf shrimp and other small community fish.

Why You'll Love Them

• One of the smallest aquarium fish species
• Perfect for nano aquariums
• Peaceful and community-friendly
• Beautiful schooling behaviour
• Excellent for planted tanks and aquascapes
• Shrimp-safe and beginner-friendly

Care Requirements

• Tank Size: 30L+
• Temperature: 22–28°C
• pH: 5.5–7.5
• Diet: Micro pellets, crushed flakes, baby brine shrimp, and other small foods
• Difficulty: Easy

Behaviour & Compatibility

Least Rasboras are peaceful schooling fish and should be kept in groups of 8 or more, with larger groups encouraging more natural behaviour and confidence.

They pair well with:

• Chili Rasboras
• Emerald Eye Rasboras
• Harlequin Rasboras
• Corydoras
• Otocinclus
• Freshwater Shrimp
• Small peaceful nano fish

Their tiny size and gentle temperament make them ideal for peaceful planted aquariums.

Aquascaping Notes

Least Rasboras truly shine in densely planted aquariums with mosses, stem plants, and natural hardscape. Their subtle colours contrast beautifully against green plants and dark substrates, while their schooling behaviour adds constant movement throughout the tank.

A mature planted aquarium with floating plants and gentle water flow will help them feel secure and display their best colours.