Hemigrammus ocellifer is a South American freshwater fish, also described by the synonyms Hemibrycon ocellifer and Tetragonopterus ocellifer. Common names include beacon fish, beacon tetra, head-and-tail light tetra and head-and-taillight tetra. It is found in the rivers of Guyana, Suriname, French Guiana, and the Amazon Basin of Brazil and Peru.
Most specimens offered for sale in the aquatics trade are tank-raised.
It has a maximum size of 5 centimetres (2.0 in); the sexes are distinguished by mature females being fuller bodied.
Beacon tetras will accept flake, micropellets, and frozen foods such as mosquito larvae, brine shrimp and daphnia.
An egg-laying species, Hemigrammus ocellifer is relatively easy to breed. A separate small planted breeding aquarium should be set up with soft, slightly acidic water, and the temperature set at the high end of their range. When morning sunlight hits the tank, spawning should commence, and between 200 and 1000 eggs can be laid. The parents should be removed immediately after spawning ceases, and the eggs will hatch in 24 hours.
