Dwarf Spotted Rasbora Care Guide - Aquarium Tips, Diet & Breeding

The Dwarf Spotted Rasbora is a minute, subtly patterned cyprinid with a warm reddish-brown to copper body. Several dark markings along the flanks give Boraras maculatus its spotted appearance, while the fins may show delicate red or orange tones, particularly in mature males.

These fish are peaceful, alert and most impressive when kept in a proper shoal. Rather than swimming constantly in open water, they tend to hover, explore and dart among plants, roots and other cover, displaying more confidence and colour when surrounded by their own kind.

In the wild, Dwarf Spotted Rasboras inhabit quiet, tannin-stained waters beneath tropical forest. Fallen leaves, submerged branches and aquatic vegetation create a complex environment with subdued light and numerous small spaces to investigate.

Their tiny size and gentle temperament make them a popular choice for carefully planned nano aquariums. They are best appreciated as a group, where their coordinated movements and courtship displays reveal far more character than their diminutive stature might suggest.

Dwarf Spotted Rasboras are native to the Malay Peninsula and parts of Sumatra and Borneo in Southeast Asia. They occur in slow-moving forest streams, peat swamps and blackwater habitats associated with leaf litter and dense marginal vegetation.

A group should be housed in an aquarium of at least 30 litres, with a footprint of roughly 45 x 25 cm or larger. Use gentle filtration and leave calm swimming areas among dense plants, moss, fine roots and small pieces of wood. A dark, fine-grained substrate, leaf litter and subdued lighting help recreate their forest-stream surroundings and bring out their colours. Cover the aquarium securely, as these small fish can jump when startled.

Up to around 2.5 cm (1 inch) in total length. Females are generally slightly larger and deeper-bodied than males, which are usually more slender.

Offer a varied diet of appropriately tiny foods, such as finely crushed quality flakes, nano pellets, baby brine shrimp, daphnia, cyclops and other small frozen or live foods. Live and frozen foods help maintain colour and condition, while several small meals are preferable to one large feeding because of their tiny mouths. Remove uneaten food promptly, particularly in a small aquarium.

Dwarf Spotted Rasboras suit peaceful nano-community aquariums with similarly small species. Good companions include small Boraras species, celestial pearl danios, ember tetras, chilli rasboras, pygmy Corydoras, otocinclus and peaceful freshwater shrimp, provided the aquarium is appropriately arranged. Avoid large, boisterous or predatory fish, including angelfish, larger gouramis, many barbs and most cichlids, as these may intimidate or eat them. They can also prey on very small shrimp fry.

Dwarf Spotted Rasboras are egg-scattering fish that may spawn regularly in mature, densely planted aquariums. For more reliable results, place a conditioned group in a separate, dimly lit breeding tank containing fine-leaved plants or spawning mops. The adults should be removed after spawning because they may eat the eggs. Eggs usually hatch within a few days, and the tiny fry initially require infusoria or another suitably fine first food before progressing to newly hatched brine shrimp.

Males are typically slimmer and more intensely coloured, with stronger red or orange tones and sharper contrast in the flank markings. Females are usually slightly larger, paler and noticeably fuller through the abdomen, especially when carrying eggs.