Diamond Tetra

About

The diamond tetra (Moenkhausia pittieri) has one of the better glow-up stories in the hobby. Juveniles sold at fish shops are typically a plain, silvery nothing. Easy to overlook in a dealer's tank. Given a few months, a good varied diet, and decent conditions, they transform into something quite different: adults develop an iridescent sheen across every scale that genuinely catches the light, and males in particular grow noticeably larger and more impressive than most tetras you'll encounter. In the wild, this species is native to the Lake Valencia basin in Venezuela, a relatively limited range. In the aquarium it's a peaceful, active schooling fish that does best in groups of at least six to eight individuals. Fewer than that and you're more likely to see the fin-nipping behavior this species has a reputation for. A larger group tends to keep any squabbling contained among themselves. A well-planted tank suits them nicely and really shows off their reflective coloration. They're compatible with most community fish of similar temperament, including livebearers, rasboras, Corydoras, and even some dwarf cichlids. Their rounded body shape and adult size also make them a reasonable dither fish alongside calmer medium-sized cichlids. Breeding is achievable with some patience and a dedicated spawning setup.