Hemigrammus ocellifer is a classic and enduring tetra species whose common name — the Head-and-Tail-Light Tetra — perfectly describes its most characteristic feature: two brilliant golden-orange spots, one at the upper edge of the eye and one at the caudal peduncle, that catch and reflect light beautifully in a well-lit aquarium. The body itself is relatively translucent silver, making the glowing spots all the more striking, particularly in groups. The Beacon Tetra is native to the slow-moving, often blackwater tributaries and floodplain lakes of South America, where it schools in large numbers among submerged vegetation and roots. In captivity, this species is among the hardiest and most forgiving of tetras, tolerating a wider range of water parameters than many of its relatives while still thriving best in soft, slightly acidic conditions. It is entirely peaceful and poses no threat to tankmates of any size. Keeping the Beacon Tetra in schools of 8 or more brings out the best in its behavior — confident schooling, natural exploration, and the full visual impact of multiple glowing spots moving in unison. It is an excellent choice for planted aquariums and South American biotope setups alike.
