Head and Tail Light Tetra

The Head and Tail Light Tetra is a classic aquarium species that has been in the hobby for decades, beloved for the characteristic golden-orange iridescent spots that glow at the top of the eye and at the base of the caudal fin. These twin points of light give the fish its common names — Beacon Fish and Head and Tail Light Tetra — and are especially vivid under dim or blue-spectrum lighting. The body itself is a translucent silver with a faint lateral stripe, making the glowing spots even more conspicuous. Native to a wide range of South American river systems including the Amazon basin, this species is highly adaptable and tolerates a broad range of water parameters, which contributes to its enduring popularity among beginners. It is a mid-water schooling fish that is active throughout the day, constantly moving in loose formation with its schoolmates. Peaceful and non-aggressive, it is an excellent choice for community tanks housing other small tetras, livebearers, rasboras, corydoras, and peaceful cichlids. Its hardiness, attractive markings, and ease of care make it one of the most recommended beginner tetras available. Provide a planted tank with dark substrate to show the luminescent spots at their best.

Tank Setup A 60-liter aquarium is suitable for a school of six to eight. Use dark substrate and plant the sides and back with fine-leaved or broad-leaved plants, leaving open swimming space in the center. Soft, slightly subdued lighting enhances the glowing spots.

Water Parameters pH 5.5–7.5, temperature 22–28°C, general hardness 2–15 dGH. This adaptable species tolerates a wide range of conditions and is forgiving of minor fluctuations, making it well suited to community tanks with varied parameters.

Feeding An eager feeder that accepts flake, micro-pellets, and small frozen or live foods including brine shrimp, daphnia, and bloodworm. Feed twice daily in small quantities. A varied diet maintains health and color intensity.

Tankmates Compatible with virtually all peaceful community species. Good companions include neon tetras, ember tetras, rasboras, small loaches, corydoras, and peaceful cichlids. Avoid large or aggressive tankmates.

Schooling Keep a minimum of six. Larger groups of eight to twelve show more natural, confident schooling behavior.

Health and Maintenance One of the hardiest tetras available. Perform regular weekly water changes of 20–30%. Monitor for common freshwater ailments such as ich. Well-maintained specimens are long-lived and resilient.