noun (plural same or beaconfishes)
A popular aquarium characin from tropical South America, with a red and gold spot near the base of the tail fin and another near the eye.
- Hemigrammus ocellifer, family Characidae.
- Phenotypically beacon fish are brown to greenish-yellow in color with a silvery iridescence.
- The deep body outline of the Beacon Fish follows the general tetra pattern.
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