Emperor tetras are among the longest-lived tetras: fish kept in appropriate conditions may live for up to five years. Unlike its close relative N. lecortei (Rainbow Emperor Tetra), this species does not possess blue marbling, and its eyes are greenish blue rather than red. Nematobrycon amphiloxus (sometimes written as N. “amphiloxus”) is believed to be a smoky colored naturally occurring morph of the Emperor Tetra.
- Nematobrycon amphiloxus
- Western Colombia.
- Up to 2 1/2in (6cm), but usually a little smaller.
- Quiet, peaceful fish; should he kept in small groups.
- Wide range of foods accepted.
- Well planted, with ample swimming space, and dark substratum. Softish, acid to slightly alkaline water quite suitable. If possible, water should be tannin-stained. Regular partial water changes should be carried out, but any alterations to water chemistry must be made gradually. Temperature range: 73-81 F (23-27 C).
- Can be challenging. Soft, acid water and darkened aquarium recommended. Eggs are laid singly among vegetation and may be eaten by the spawning pair. Hatching takes 1-2 days.