A peaceful, schooling characin named for the reflective copper/gold spots on its head and the base of its tail. These 'lights' evolved to help the school stay together in the dark, tannin-stained waters of the Amazon basin. They are hardy, active, and make excellent community fish for planted aquariums.
Head and Tail Light Tetra At a Glance
Head and Tail Light Tetra Tank Requirements
Will Head and Tail Light Tetra fit in your tank?
Care guides tell you what Head and Tail Light Tetra needs, the next question is whether your tank can safely provide it. Test Head and Tail Light Tetra against your tank size, maintenance needs, and the fish you already keep before you buy.
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Head and Tail Light Tetra Water Parameters
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Head and Tail Light Tetra Temperament & Compatibility
Head and Tail Light Tetra Varieties
Each variety inherits the species defaults above. Only differences are highlighted.
Standard
The standard Head and Tail Light Tetra. Must be kept in schools of 6 or more to display natural behavior and reduce stress. They look best under somewhat subdued lighting or floating plants, which brings out their reflective spots.
Differs in 1 trait from base species
Also known as: Wild Type
Head and Tail Light Tetra Care Guide Summary
The Head and Tail Light Tetra, scientifically known as Hemigrammus ocellifer, belongs to the Characins family group. Adults reach a maximum size of approximately 4.5 cm and have a compressed body shape with a moderate growth rate. Classified as peaceful, this species primarily occupies the mid-level and surface zones of the aquarium and produces a low level of biological waste.
To thrive, the Head and Tail Light 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 6–7.5 and a general hardness of 4–15 dGH. A moderate water flow is preferred.
The Head and Tail Light Tetra is a rewarding species to keep, provided its core environmental needs are met. The Head and Tail Light Tetra is typically available in one standard form.
Head and Tail Light Tetra Habitat Setup
When setting up an aquarium for the Head and Tail Light Tetra, a moderate water flow best suits their natural preferences. Because this species occupies the mid-level and surface zones, the aquarium layout should prioritise adequate surface area with floating cover to make them feel secure near the waterline and open swimming space in the centre of the tank for free movement. Useful additions include leaf litter or blackwater tannins to replicate their natural soft-water habitat and dense planting to provide cover, break sightlines, and reduce stress.
Head and Tail Light Tetra Compatibility Notes
Classified as peaceful, the Head and Tail Light 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 and surface zones can help reduce competition and territorial overlap.
Head and Tail Light Tetra Recommended Tank Sizes
Standard aquarium sizes that meet the minimum volume and length requirements for Head and Tail Light Tetra.
20 Gallon High
20 Gallon Long
29 Gallon Standard
30 Gallon Breeder
36 Gallon Bowfront
40 Gallon Breeder
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Frequently Asked Questions About Head and Tail Light Tetra
How big does Head and Tail Light Tetra get?
Head and Tail Light Tetra (Hemigrammus ocellifer) typically reaches a maximum adult size of approximately 4.5 cm. They have a compressed body shape and a moderate growth rate.
What tank size does Head and Tail Light Tetra need?
A minimum aquarium volume of 60 litres and a tank length of at least 60 cm are recommended for Head and Tail Light Tetra. This ensures enough swimming space and helps maintain stable water conditions.
What water parameters does Head and Tail Light Tetra need?
Head and Tail Light Tetra thrives in freshwater only conditions with a temperature range of 24–28°C, a pH between 6 and 7.5, and a general hardness of 4–15 dGH. A moderate water flow is preferred.
Is Head and Tail Light Tetra peaceful or aggressive?
Head and Tail Light Tetra is classified as peaceful with an aggression score of 1 out of 10. They are generally well-suited to peaceful community tanks.
How many Head and Tail Light Tetra should be kept together?
Head and Tail Light Tetra is a schooling species and should be kept in groups of at least 6. Larger groups help distribute aggression and encourage natural schooling behaviour.
Does Head and Tail Light Tetra have any special tank requirements?
Yes. Head and Tail Light Tetra benefits from plants - densely covered and leaf litter/blackwater in the aquarium. These features help replicate their natural habitat and promote overall health and well-being.
Top Tank Mates for Head and Tail Light Tetra
These fish are strong compatibility matches for Head and Tail Light Tetra based on water preferences, temperament, adult size, and tank behavior.
Schwartz's Cory
Corydoras schwartzi
Ideal Tank MatesLeopard Cory
Corydoras leopardus
Ideal Tank MatesGold Laser Cory
Corydoras sp. 'CW010'
Ideal Tank MatesDainty Cory (Salt and Pepper Cory)
Corydoras habrosus
Ideal Tank MatesIncolicana Corydoras
Corydoras incolicana
Ideal Tank MatesEmerald Green Cory
Corydoras splendens
Ideal Tank MatesPlants That Suit Head and Tail Light Tetra
These plants pair well with Head and Tail Light Tetra based on shared water preferences, layout fit, and how likely they are to hold up in the same aquarium.
Afzel's Anubias
Anubias afzelii
Amazon Sword
Echinodorus amazonicus
Anacharis
Egeria densa
Anubias Barteri
Anubias barteri
Baby Tears
Lindernia rotundifolia
Balansae
Cryptocoryne crispatula
Fish Similar to Head and Tail Light Tetra
Glass Bloodfin Tetra
Prionobrama filigera
A highly active, schooling characin characterized by its translucent body and striking blood-red anal fin. They are peaceful but exceptionally fast-moving, requiring plenty of open horizontal swimming space in the upper levels of the aquarium. They are known to be skilled jumpers, making a tight-fitting lid mandatory.
Glowlight Tetra
Hemigrammus erythrozonus
A peaceful, schooling nano fish native to the Essequibo River basin in South America. They are famous for their translucent bodies and the striking iridescent neon-orange stripe running from snout to tail. They thrive in mature, planted aquariums with slightly soft, acidic water and subdued lighting.
Penguin Tetra
Thayeria boehlkei
An active schooling characin instantly recognizable by its bold black horizontal stripe that extends down into the lower half of the tail fin, and its unique, oblique (head-up) swimming posture. They are hardy and do well in community tanks, but must be kept in groups to prevent stress and fin-nipping behavior towards tank mates.
Lemon Tetra
Hyphessobrycon pulchripinnis
A peaceful, deep-bodied schooling tetra known for its translucent yellow coloration and striking black and yellow fins. They are robust and active, making them an excellent choice for planted community aquariums. Their colors intensify significantly in a well-established tank with a dark substrate and proper schooling numbers.
Brilliant Rummy-Nose Tetra
Hemigrammus bleheri
One of the tightest schooling fish in the aquarium hobby, known for their striking bright red faces and black-and-white horizontally striped tail fins. They are highly active and need plenty of horizontal swimming space. The intensity of their red 'nose' serves as an excellent biological indicator of water quality and stress; it fades significantly if water parameters drop or they feel insecure.
Flag Tetra
Hyphessobrycon heterorhabdus
A peaceful, active schooling fish native to the Amazon basin. It is commonly called the 'Belgian Flag Tetra' due to the distinctive tricolor lateral stripe (black, red, and yellowish-white) running along its side. They are an excellent community fish that thrives in planted aquariums with soft, slightly acidic water. Like most tetras, they must be kept in groups to feel secure and display their best colors.