Aphyocharax nattereri · Dawn Tetra

Overview

An active small tetra, Aphyocharax nattereri often uses the upper aquarium and sometimes jumps. It can work in a community, but occasional nipping and constant movement may trouble long-finned, slow, or sedentary companions.

Distribution & habitat

It occurs in streams, rivers, and tributaries of southern Brazil, Bolivia, and Paraguay, commonly beneath floating vegetation or overhanging bankside growth.

Aquarium setup

Combine densely planted areas with open swimming room, using roots or wood for structure. Floating cover suits its upper-water activity. Fit a secure lid and close accessible gaps around equipment because jumping is a real risk.

Diet & feeding

Dry, frozen, and live foods are readily accepted. Rotate suitable foods instead of relying on a single product.

Behaviour & compatibility

Keep at least six. Other active characins and small bottom-dwelling catfish are useful options, with peaceful South American dwarf cichlids also possible. Avoid long-finned or slow companions; persistent activity can be disruptive even without overt fighting.

Sexual dimorphism

Gravid females become fuller-bodied, while males show stronger anal-fin markings.

Breeding

A separate spawning aquarium needs fine-leaved plants and gentle air-driven sponge filtration in soft, acidic water. Condition adults together on live and frozen food, then introduce a well-filled female and strongly displaying male. Ready fish may spawn the next morning; continue conditioning if they do not.

Eggs are deposited among plants but are nonadhesive, with some falling or floating. Remove adults afterward because they eat eggs. Hatching takes about a day. Once yolk is absorbed, provide infusoria-sized food before microworms and Artemia nauplii. A single spawning may yield several hundred young, making rearing capacity worth planning.

Notes

Trade labels often retain A. paraguayensis, and individuals may arrive mixed with other tetra shipments. A distant type locality has left historical identification questions, so an old label does not establish every claimed origin.