Lake Tebera Rainbowfish (Melanotaenia herbertaxelrodi)

Lake Tebera Rainbowfish (Melanotaenia herbertaxelrodi), also known as the Yellow Rainbowfish, is an active Papua New Guinea rainbowfish for spacious planted aquariums. Mature fish develop a warm yellow body, dark lateral line and bright fin colour, especially when kept in a settled group with clean water and open swimming room.

This is a shoaling fish, not a single centrepiece. It looks best in a group, where males display to each other and the whole shoal moves through the upper and middle water.

Quick Facts

Why Choose Lake Tebera Rainbowfish?

Lake Tebera Rainbowfish are chosen for movement as much as colour. They are constantly active, but not normally aggressive, and a group can make a planted aquarium feel alive without the territorial pressure of cichlids. Males colour more strongly as they mature, so young fish may look modest at first and improve with age, diet and confidence.

They are especially rewarding in a long aquarium where they can swim properly. A short, cramped tank makes rainbowfish nervous and does not show their natural behaviour. If you want a peaceful display fish for the top and middle levels of a larger community setup, this species is a strong choice.

Water Parameters

FishBase places this species in freshwater from the Lake Tebera basin in the Southern Highlands of Papua New Guinea. Aquarium references consistently favour clear, stable water and planted cover rather than harsh current. Avoid treating it as a tiny beginner fish just because it is peaceful.

Aquarium Setup

A good layout gives both movement and security. Planting around the edges gives the fish confidence, while the middle and front of the tank should stay open. Darker substrate and healthy plants often make the yellow body colour look stronger.

Tank Mates

They are peaceful, but they are quick and confident at feeding time. Pair them with fish that are not easily intimidated and that enjoy similar stable water. Do not mix them into a small nano community just because they are not aggressive.

Feeding

Rainbowfish often colour best when fed a varied diet and kept in clean, oxygen-rich water. Avoid overfeeding rich frozen foods, especially in out-of-stock planning tanks where filtration and stocking may still be changing.

Size Options and Arrival Notes

When restocked, check the selected size and plan the shoal around adult needs rather than the current juvenile size. Acclimate slowly, keep lights low at first and release the fish into a mature aquarium with stable water.

You Might Also Like

• Lake Kurumoi Rainbowfish
• New Guinea Red Rainbowfish
• Neon Dwarf Rainbowfish
• Boesemani Rainbowfish
• Dwarf Neon Rainbowfish

Best For

Choose Lake Tebera Rainbowfish if you want a peaceful, active shoal for a long planted aquarium. It is best for keepers who can offer space, a proper group and stable water, rather than for very small beginner tanks.