Hyphessobrycon sweglesi is a species of tetra that live in the Orinoco River drainage basin in South America. The fish has a round black spot behind the gill-plate, a black band on the dorsal fin that is bordered above and below by creamy-white. The other fins are red same as the upper rim of the eye. The fish eats worms, small insects, and crustaceans. The species can lay up to 400 eggs that can hatch in a day and that are susceptible to fungus. The species' appearance is very similar to Hyphessobrycon megalopterus (Serpae tetra). The species' scientific name used to be Megalamphodus sweglisi and the species' common name is red phantom tetra.
- "Hyphessobrycon sweglesi (Géry, 1961) Red phantom tetra". FishBase. Retrieved 2009-11-05.
- McInerny, Derek; Geoffry Gerard (1989). All About Tropical Fish (4th ed.). Great Britain: Harrap Limited. p. 248. ISBN 0-8160-2168-6.
- "Red Phantom Tetra Information". Tropical Fish Aquariums. Retrieved 2009-11-05.