Moenkhausia costae - Tetra Fish for Sale UK

Hunting through our South American tetra section often turns up familiar names, but the Moenkhausia genus rewards a closer look. Moenkhausia costae — the species on this page — is catalogued here under its full scientific name, so you know precisely which fish you are researching and which fish arrives in the bag. Keepers who like to do their homework before buying can work straight from the care details published on this listing rather than guessing from a trade name.

Compatibility is where this listing gives the clearest guidance. Moenkhausia costae does best alongside peaceful, suitably sized companions that share similar water requirements. Steer well clear of aggressive species, anything with a confirmed reputation for fin nipping, and any tank mate large enough to swallow a tetra — those three exclusions alone prevent most community mishaps. Before finalising your stocking plan, check the current size and adult-size guidance shown on this page, because companion choices should always be made against the adult fish, not the juvenile that arrives.

A mature, stable aquarium is non-negotiable for this species. Newly cycled or unsettled tanks put unnecessary strain on freshly delivered livestock, so let your filtration and water chemistry prove themselves before placing an order.

Moenkhausia costae care at a glance

• Scientific name: Moenkhausia costae
• Group: South American tetra (Moenkhausia genus)
• Aquarium: mature, stable and well filtered before introduction
• Feeding: appropriate aquarium foods for this livestock group, offered in modest portions
• Good tank mates: peaceful, suitably sized fish with similar water requirements
• Avoid: aggressive fish, confirmed fin nippers, and anything big enough to swallow it

Ordering and acclimation

Every fish we send travels with a licensed live-animal courier and is covered by our live arrival guarantee. When your Moenkhausia costae arrives, float the bag, acclimate slowly, keep the lights low and hold back on heavy feeding for the first day. Watch breathing, posture, colour and appetite closely across the first week — early observation catches stress, chasing or feeding problems while they are still easy to correct. If this listing shows as sold out, stock rotates regularly, so check back soon or browse the rest of our Moenkhausia range while you wait.