Blue Emperor Tetra

The Blue Emperor Tetra, scientifically known as Inpaichthys kerri, belongs to the Characins family group. Adults reach a maximum size of approximately 4 cm and have a compressed body shape with a moderate growth rate. Classified as peaceful, this species primarily occupies the mid-level zone of the aquarium and produces a low level of biological waste.

To thrive, the Blue Emperor Tetra requires a freshwater only aquarium with a minimum volume of 60 litres and a tank length of at least 60 cm. Water temperature should be maintained between 24°C and 28°C, with a pH range of 5.5–7.5 and a general hardness of 1–12 dGH. A moderate water flow is preferred.

Due to its specialist needs, the Blue Emperor Tetra is best suited for fishkeepers who can provide a carefully planned setup. This species is available in 2 varieties: Standard (Wild Type) and Super Blue Morph. Each may differ slightly in size, temperament, or care needs, so it is worth checking the specific requirements of the variety you plan to keep.

When setting up an aquarium for the Blue Emperor Tetra, a moderate water flow best suits their natural preferences. Because this species occupies the mid-level zone, the aquarium layout should prioritise open swimming space in the centre of the tank for free movement. Useful additions include driftwood, which can serve as both a hiding place and a dietary supplement, leaf litter or blackwater tannins to replicate their natural soft-water habitat, and dense planting to provide cover, break sightlines, and reduce stress.

Classified as peaceful, the Blue Emperor Tetra is a schooling species that feels most secure in a sizeable group, where natural shoaling behaviour reduces stress and brings out their best colours. When choosing tankmates, their energetic swimming style may stress more sedentary or timid species. Selecting tankmates that favour different water layers from the mid-level zone can help reduce competition and territorial overlap.