Black Phantom Tetra Care Guide - Aquarium Setup, Diet & Breeding

The Black Phantom Tetra is a compact, deep-bodied characin named for the smoky black patch behind its gill cover. Its silvery-grey body is accented by translucent fins, dark markings and, in mature males, a strikingly extended dorsal fin that gives the fish a dramatic silhouette when it displays.

These peaceful tetras are active but not frantic, spending much of their time in the middle levels of the aquarium. Males frequently posture alongside one another, spreading their fins and presenting their dark flank patches in harmless contests. These displays are usually more impressive than aggressive, and they help establish a natural social hierarchy.

In the wild, Black Phantom Tetras are associated with quiet tributaries, flooded forest areas and tannin-stained waters where leaf litter, submerged roots and overhanging vegetation break up the sunlight. Their subdued colouring is especially attractive under gentle, shaded lighting.

Hyphessobrycon megalopterus is one of the most popular South American tetras because it combines an unusual appearance with lively social behaviour and a generally peaceful temperament. A group creates constant movement while the males' contrasting black-and-silver displays add character to a community aquarium.

Black Phantom Tetras originate in South America, particularly the tributaries and floodplain waters of Brazil and Bolivia, including parts of the upper Madeira and Paraguay drainage systems. They inhabit slow-moving streams, forest margins and other warm freshwater environments with dense vegetation and subdued light.

A group should have at least a 75-litre aquarium, with a footprint of around 60 by 30 cm or larger; a longer tank is preferable because it provides more swimming space. Use a dark, fine-grained substrate with dense planting around the sides and back, open water for schooling, and wood, leaf litter or other shaded retreats. Gentle filtration, subdued lighting and some floating vegetation help recreate their dim, sheltered natural habitat while leaving room for circulation and swimming.

Up to 4.5 cm (1.8 in) in adult length. Males are often slightly slimmer and may reach a marginally greater length than females, although the difference is small.

Black Phantom Tetras are omnivores and thrive on a varied diet of quality small granules or flakes supplemented with frozen or live foods. Daphnia, brine shrimp, mosquito larvae and bloodworms are excellent occasional choices, while finely crushed foods suit smaller individuals. Offer small portions once or twice daily, with enough food consumed promptly to prevent waste.

Black Phantom Tetras are peaceful community fish and can be housed with similarly sized, non-aggressive species such as other small tetras, rasboras, pencilfish, corydoras, otocinclus and peaceful dwarf cichlids. Avoid large predatory fish, boisterous fin-nippers and aggressive species that may intimidate or injure them. They should not be kept with very large fish or species likely to swallow them.

Black Phantom Tetras are egg scatterers that can be bred in a separate, dimly lit breeding aquarium with soft, slightly acidic water and fine-leaved plants or spawning mops. Condition males and females with plenty of live or frozen foods, then introduce a pair or small group. Spawning usually takes place among the plants, after which the adults should be removed because they may eat the eggs. The eggs hatch in roughly 24 to 36 hours, and the tiny fry can be raised on infusoria before progressing to newly hatched brine shrimp.

Females are usually deeper-bodied and rounder, particularly when carrying eggs, and often show warmer reddish tones in the pelvic fins. Males tend to be slimmer, with longer, more pointed dorsal and anal fins and stronger black-and-silver contrast during courtship displays.