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.


Bleeding Blue Tetra
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℃


In the home aquarium, the Bleeding Blue Tetra will readily accept most good quality dried foods such as granules, flakes and sinking pellets. These modern food products have been developed to provide all adequate nutrition to maintain your fish's health and dietary requirements.

Providing additional foodstuffs such as live, frozen, and freeze-dried meals such as bloodworm, daphnia, and tubifex once or twice a week will provide additional benefits to your fish's health and well-being but is not a must for this fish.

It should be noted that bloodworms should only be given as an occasional treat and should not be used as the staple diet as they are difficult for fish to digest and can potentially cause blockages.

This fish is an omnivore in the wild, meaning it will consume some vegetable matter. Although most modern fish foods take this into account and include them in their products, you can still supplement your fish's diet with blanched vegetables such as spinach, broccoli, and zucchini. Ensure you do not overfeed your fish and remove any leftovers the following day.

Sexual Dimorphism

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.

Other Tetras of interest

Adonis Tetra(Lepidarchus adonis)
African Moon Tetra(Bathyaethiops caudomaculatus)
African Red Eyed Tetra(Arnoldichthys spilopterus)
Arowana Tetra(Gnathocharax steindachneri)
Black Darter Tetra(Poecilocharax weitzmani)
Black Line Tetra(Hyphessobrycon scholzei)
View all Tetras
Date Added: 08/11/2021 12:06:06 - Updated: 08/08/2022 16:05:57