
Source: Wikimedia Commons
Megalamphodus megalopterus
A small characin, grey-brown with a large black humeral spot. Males have enlarged black fins while females are deeper-bodied with reddish pelvic, anal and adipose fins. A group of eight or more is needed to see the males display.
Megalamphodus megalopterus lives in the upper Paraguay and Guaporé basins of South America. FishBase records a maximum of 3.6cm SL, pH 6.0-7.5, up to 18 dH and 22-28C, lists a diet of worms, small insects and crustaceans, and advises groups of five or more with a minimum tank length of 60cm. Seriously Fish gives 36mm SL, 20-28C, pH 5.0-7.0, 1-12 dGH and an 80 x 30cm base of about 72 litres. The body is grey-brown with a large black humeral spot; adult males have black fins with enlarged pelvic, dorsal and anal fins, while females are deeper-bodied with reddish pelvic, anal and adipose fins. Males form temporary dominance hierarchies and compete for females, so a mixed-sex group of eight to ten brings out both behaviour and colour. It is farmed commercially in several countries and a long-finned strain is also traded. The IUCN rates it Least Concern and it is not listed by CITES.
Source: Wikipedia (CC BY-SA 4.0)
The Black Phantom Tetra lives 3-5 years.
The Black Phantom Tetra grows to Up to 3.6cm SL.
The ideal temperature for the Black Phantom Tetra is 20〜28℃.
Origin
South America (upper Paraguay and Guaporé basins)
Lifespan
3-5 years
Sources: FishBase / Seriously Fish
Edited & verified by: BreederDirect editorial team
The taxonomic, regulatory, and husbandry data on this page are compiled and verified against the authoritative primary sources below.
Sources: CITES Appendices (species not listed) / IUCN Red List
Regulations may change. Always verify the latest information with the relevant authorities.
Find listings for this species
Size
Up to 3.6cm SL
Temperature
20〜28℃
Dried, frozen and live foods
Seriously Fish suggests an 80 x 30cm base of about 72 litres and FishBase a minimum length of 60cm. A dark substrate with dense planting and floating plants to soften the light brings out the colour, and open space lets the males display.
Seriously Fish gives 20-28C, pH 5.0-7.0 and 1-12 dGH, while FishBase records pH 6.0-7.5, up to 18 dH and 22-28C. Its natural water is soft and acidic, though farmed fish adapt to a wider range.
Very peaceful and a good community fish, suiting similarly sized characins, hatchetfish, pencilfish, smaller Corydoras and loricariids, and non-predatory small to medium cichlids. Keep a mixed-sex group of eight to ten or more.
It feeds on worms, small insects and crustaceans. Dried food is taken readily, and frozen bloodworm or Artemia deepens the black in the males' fins. The mouth is small, so choose fine-grained foods.
An egg scatterer with no parental care. In good condition it spawns often and fry sometimes appear unaided in a mature planted tank. For numbers use a dimly lit separate tank with mesh or fine-leaved plants the eggs can fall into, and remove the adults afterwards.
Young fish in the shop look plain apart from the humeral spot, but mature males grow impressive fins. Kept in small numbers it shows little colour or behaviour, so introduce it as a group. The IUCN rates it Least Concern and it is not listed by CITES.
Beginner. This is a beginner-friendly species. No special equipment or experience is required, and it can be kept successfully with basic care setup.
The ideal temperature for Black Phantom Tetra is 20〜28℃. Avoid sudden temperature changes and maintain a stable environment.
The average lifespan of Black Phantom Tetra is 3-5 years. With proper care and nutrition, they can live a long and healthy life.
Black Phantom Tetra typically reaches Up to 3.6cm SL as an adult. Size may vary depending on care conditions and individual genetics.
Black Phantom Tetra feeds on: Dried, frozen and live foods. Aim for a balanced diet with appropriate feeding frequency.
The price of Black Phantom Tetra varies significantly depending on morph, size, and lineage. Check our market price page for the latest pricing information.
Last updated: September 17, 2026