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Maximum size : 3 cm

Morse Code Tetra - Hemigrammus sp morse code : Complete Fish Profile & Care Guide

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Regrettably, scientific literature on the Morse Code Tetra (Hemigrammus sp "morse code") is quite sparse and leaves much to be discovered. Despite this, these unique fish are a worthwhile addition to any aquarium due to their exceptional behaviour and peaceful disposition. Morse Code Tetras, members of the genus Hemigrammus, exhibit fascinating characteristics that set them apart from other tetras. For instance, rather than forming tight schools in open spaces, they prefer to take refuge beneath the shade of aquatic plants and remain motionless. These traits make them an excellent choice for the nano or planted aquarium. 

Morse Code Tetras thrive in medium to hard water, although they require softer water to spawn successfully. Due to their peaceful nature, it is recommended to house them with other small, non-aggressive species of comparable size rather than in a community aquarium.

Morse Code Tetras possess striking physical attributes, including a shimmering gold tint on their faces and bellies, complementing their translucent bodies. These Tetras get their name from their distinctive flank lines that resemble Morse code. Their dorsal fins feature eye-catching black and yellow markings, while the remaining fins are mostly clear. Some individuals may exhibit a slight red shading around their eyes, adding a touch of vibrant colour to their appearance. Despite the higher price point for such a diminutive fish, the Morse Code Tetra's distinctive appearance and behaviour make it a coveted species for hobbyists.

Morse Code Tetra Photos

Sexual Dimorphism

Distinguishing between male and female Morse Code Tetras is a relatively uncomplicated task. Males are typically more streamlined and smaller in size, while females are larger and possess a more plump abdomen.

Quick Facts

Scientific NameHemigrammus sp morse code
Other NamesNone
Max Size3 cm
Aquarium LevelMiddle - Top
DifficultyBeginner - Intermediate
Best kept asGroups 5+
LifespanUp to 5 Years

Water Parameters

Water TypeFreshwater
PH5.5 - 7.5
GH3 - 15
KH2 - 6
72 - 81
22 - 27

Natural Habitat

Regrettably, little is known about the natural environment of Morse Code Tetras. Nonetheless, these captivating fish are thought to thrive in calm waters rich in vegetation, with an abundance of submerged tree branches that provide essential shading.


Regrettably, there is a lack of documented information on successful breeding of Morse Code Tetras in the home aquarium. However, it is likely that they would follow a similar breeding pattern as other species in the genus Hemigrammus.

Diet & feeding

Morse Code Tetras are omnivorous and will consume a variety of foods, but it is crucial to provide them with suitably sized and varied food due to their small mouths. A high-quality dried food, such as crushed flakes and micro pellets, alongside live, frozen, and freeze-dried food, such as brine shrimp, daphnia, and mosquito larvae, will be readily accepted. Overfeeding should be avoided as these tetras will not consume any food that falls to the bottom of the aquarium, which may result in polluted water.

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