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Rare and Beautiful Tetra: Hemigrammus coeruleus

20 January 2020


The Hemigrammus coeruleus can be quite difficult to find. They are a rare and highly sought after species of tetra. This tetra usually reaches a maximum length of about 6-7cm, they are a larger schooling tetra.
This tetra is actually fairly similar to the well known glowlight tetra (Hemigrammus erythrozonus). During their times of ‘regular’ colouration they look wonderful, with both male and females featuring a neon pink line down their side.

However, the real magic happens when the fish enter a state of spawning. They really do look truly spectacular! The males transform into such a deep ruby red that you would be forgiven for mistaking them for a different species altogether!

There are no officially known common names, but Watermelon Tetra, Coreulean Pink Tetra and Red Laser Tetra are some which have been used by shopkeepers in the past due to the appearance of the male during spawning.

These fish originate from the lower Rio Negro river basin. Their native habitat consists a sand/silt bottom, bog wood, branches and some vegetation. These fish come from water which is quite soft with a ph between 5 and 6 and will prefer and thrive most in a slightly dimly lit aquarium.

This tetra, like most, is an insectivore but it is worth noting they love to ingest bloodworms.

To view or order this fish online, click HERE