Max Size: 5cm

Bleeding Blue Tetra (Hyphessobrycon margitae)

Bleeding Blue Tetras are a peaceful species that make excellent members of the well-planted community aquarium and will get along with most fish species. In addition, these Tetras are relatively hardy, so they make an excellent fish for the beginner aquarist.

Bleeding Blue Tetras are sociable schooling fish, so it is crucial that you keep them in a group of at least six individuals alongside other schooling fish to provide security, and you will be rewarded with a more natural-looking display.

Occasionally, you may find your fish arguing amongst themselves in a group. However, as long as your aquarium is spacious and there is plenty of hiding places or visual barriers for them to retreat into if necessary, no actual harm should follow.

You can house Bleeding Blue Tetras with similarly sized fish and the same peaceful temperament such as other small Tetras, Pencilfish, Hatchetfish, non-predatory, small to medium-sized Cichlids, Corydoras Catfish, and small Loricariids. However, these Tetras will not compete well with the more boisterous or much larger tankmates.

Bleeding Blue Tetras have a silvery body covered with iridescent scales that change from light blue to indigo or violet depending on how the light hits it. The top of the caudal peduncle is a gold shimmer, and they possess a longitudinal thick black band that extends into the tail fin. In addition, when they are showing off to females, the males display bright red colouring in their pectoral, ventral, anal and caudal fins.

Quick Facts
Scientific NameHyphessobrycon margitae
Other NamesRed-Blue Peru Tetra, Imperial Blue Rainbow Tetra, Blue Peru Redfin Tetra
Aquarium LevelMiddle - Top
DifficultyBeginner - Intermediate
Best kept asGroups 6+
Lifespan3 - 5 years
Water Parameters
Water TypeFreshwater
PH6.0 - 7.5
GH5 - 15
TDS36 - 179
75 - 79℉
23.9 - 26.1℃

Photos of the Bleeding Blue Tetra

Bleeding Blue Tetra

Natural Habitat

Bleeding Blue Tetras originate from the Rio Nanay drainage in Peru in South America; however, most are now bred in captivity. These Tetras inhabit slow-moving blackwaters in minor tributaries and forest streams with a sandy river bed, submerged driftwood, and abundant leaf litter. The water in this habitat is stained brown from tannins from decomposing leaves and wood. These Tetras presumably occur in flooded forests during periods of high water.

What to feed the Bleeding Blue Tetra

In the wild, Bleeding Blue Tetras are omnivorous. They feed on crustaceans, small invertebrates, fallen fruit, algae and suchlike. In the home aquarium, these Tetras may survive on a diet of good quality dried foods such as flakes or granules. Still, like most Tetras, Bleeding Blue Tetras fare better when offered a varied menu containing live and frozen food such as bloodworm, Mosquito larvae, Daphnia, Moina and suchlike.

How to sex the Bleeding Blue Tetra

It is relatively simple to differentiate between the male and the female Bleeding Blue Tetra. The males will, in general, be slimmer and more vibrantly coloured with red colouring on their anal, caudal, dorsal and pelvic fins. In contrast, females are usually stockier and have slightly higher bodies. Also, the females do not display the red colour in their fins.

How to breed the Bleeding Blue Tetra

Bleeding Blue Tetras can be somewhat challenging to breed; however, it is achievable.

A separate breeding tank will need to be set up if you would like to increase the yield of the fry. Your breeding tank needs to be dimly lit and contain bundles of fine-leaved plants such as Java Moss. Spawning Mops will also work, as would synthetic grass matting or a layer of glass marbles. These mediums will give your fish somewhere to deposit their eggs.

It is also recommended that you cover the bottom of the tank with some mesh. This mesh should have large enough holes so the eggs can drop through it but small enough to prevent the parents from reaching them.

The water will need a slightly acidic to neutral pH level with a marginally higher temperature than the community aquarium. Including an air-powered sponge filter or an airstone would also be beneficial to provide water movement and oxygenation.

You can spawn Bleeding Blue Tetras in a group, with half a dozen individuals of each sex being ideal. It would be best to condition them with plenty of live and frozen foods, and then spawning should not bestow too many issues.

Alternatively, you can spawn these fish in pairs. The best way to achieve this is to condition the male and female groups in separate tanks with a good-quality diet of live and frozen foods.

Once the females are noticeably full of eggs and the males are presenting their best colours, select the most significant female and the best-coloured male and place them into the breeding tank. The couple should then spawn the following morning. In either situation, the adults will consume the eggs if given a chance, so it would be best to remove them as soon as you detect any.

The eggs will typically hatch between 24 and 36 hours later, and the fry will start swimming freely 3 to 4 days after that.

It would be better to feed the fry with infusoria type foods for the first few days until they are big enough to accept baby brine shrimp and microworms.

Unfortunately, the eggs and the fry are sensitive to light in the initial stages, so it would be better if you kept the lights dim or maybe even off.

Other Tetras of interest

African Moon Tetra(Bathyaethiops caudomaculatus)
African Red Eyed Tetra(Arnoldichthys spilopterus)
Black Darter Tetra(Poecilocharax weitzmani)
Black Line Tetra(Hyphessobrycon scholzei)
Black Neon Tetra(Hyphessobrycon herbertaxelrodi)
Black Phantom Tetra(Hyphessobrycon megalopterus)
View all Tetras
Date Added: 08/11/2021 12:06:06 - Updated: 22/11/2021 16:57:13