Lemon Tetra Care Guide - Aquarium Setup, Diet & Breeding

The Lemon Tetra is a compact, laterally compressed characin with a translucent silver to yellow-gold body and distinctive yellow fins. Mature fish develop especially attractive lemon colouring, while the eyes show a vivid red upper portion that contrasts with the dark markings on the fins.

Peaceful and active, Lemon Tetras spend much of their time in the middle levels of the aquarium. They are schooling fish that become more confident and display more natural social behaviour when kept in a good-sized group, with males often showing off to one another by extending their fins and intensifying their colour.

In the wild, this species occurs in warm, slow-moving or gently flowing waters within the Amazon basin. Such habitats may be shaded by overhanging vegetation and influenced by fallen leaves, branches and other organic matter, creating subdued conditions and a complex network of cover.

Hyphessobrycon pulchripinnis has long been valued in the aquarium hobby for its manageable size, peaceful nature and bright, refined appearance. A mature shoal can add lively movement without overwhelming a planted community aquarium.

Lemon Tetras are native to Brazil in South America, particularly the lower Rio Tapajós basin in Pará. They inhabit smaller tributaries, forest streams and quieter waters associated with the Amazon drainage.

A group of Lemon Tetras should have at least a 60-litre aquarium, with a footprint of approximately 60 cm by 30 cm or larger to provide useful horizontal swimming space. Use a dark or natural fine substrate, dense planting around the sides and back, and open water through the centre. Driftwood, roots, leaf litter and subdued lighting can create a sheltered, stream-like layout, while gentle filtration and a secure cover help maintain calm, stable conditions.

Lemon Tetras reach a maximum adult length of about 4.5 cm (1.8 in). Females are usually slightly deeper-bodied and may be marginally larger than males.

Lemon Tetras are omnivores and should receive a varied diet of quality tropical micro-pellets or fine flakes supplemented with frozen or live foods. Daphnia, brine shrimp, bloodworm and mosquito larvae can be offered in appropriately small portions, while occasional plant matter or spirulina-based foods helps provide balance. Small meals that they can consume quickly are preferable to large quantities.

Lemon Tetras are peaceful community fish and can be kept with other similarly sized, calm species such as harlequin rasboras, ember tetras, rummy-nose tetras, pencilfish, small Corydoras and peaceful dwarf gouramis. They also mix well with other peaceful South American tetras when sufficient swimming space is available. Avoid large predatory fish, fin-nipping species and boisterous tankmates that may intimidate or outcompete them for food.

Lemon Tetras are egg scatterers that can be bred in a separate, dimly lit breeding aquarium with very soft, slightly acidic water and fine-leaved plants or spawning mops. Condition the adults with small live or frozen foods, then introduce a pair or small group. Spawning usually takes place among the plants, after which the adults should be removed because they may eat the eggs. The eggs generally hatch within 24 to 36 hours, and the tiny fry can initially be fed infusoria or another suitably fine first food before moving on to newly hatched brine shrimp.

Males are generally slimmer and develop stronger yellow colouration, with more extended black-and-yellow fin markings. Females are fuller through the belly, particularly when carrying eggs, and are often slightly larger overall.