The Cuban Gar (Manjuarí) is a massive, ancient ambush predator native to the fresh and brackish waters of Cuba. It features a crocodilian snout, heavy armor-like scales, and a torpedo-shaped body. Due to its extreme adult size, it is strictly recommended only for expert aquarists with indoor ponds or enormous custom tanks. It will swallow any tank mate small enough to fit in its jaws, but generally ignores fish that are too large to eat.
Cuban Gar At a Glance
Cuban Gar Tank Requirements
Will Cuban Gar fit in your tank?
Care guides tell you what Cuban Gar needs, the next question is whether your tank can safely provide it. Test Cuban Gar against your tank size, maintenance needs, and the fish you already keep before you buy.
Useful setup supplies
We may earn from qualifying purchases
Cuban Gar Water Parameters
Water care products
We may earn from qualifying purchases
Cuban Gar Temperament & Compatibility
Cuban Gar Varieties
Each variety inherits the species defaults above. Only differences are highlighted.
Standard (Adult)
The fully mature adult. Requires heavy-duty pond-level filtration, enormous swimming space, and a highly secure, heavy lid to prevent fatal jumping injuries. Keep only with equally large, deep-bodied tank mates.
Same care requirements as the base species
Also known as: Full Grown, Monster
Juvenile (Grow-out)
Young Gars grow exceptionally fast. While they can be temporarily housed in a standard 6-foot aquarium during their first year, an upgrade plan for a massive custom setup or pond must already be in place.
Differs in 5 traits from base species
Also known as: Baby Gar, Juvenile Gar
Cuban Gar Care Guide Summary
The Cuban Gar, scientifically known as Atractosteus tristoechus, belongs to the Oddballs family group. Adults reach a maximum size of approximately 150 cm and have a fusiform body shape with a moderate growth rate. Classified as semi-aggressive, this species primarily occupies the surface and mid-level zones of the aquarium and produces a extreme level of biological waste.
To thrive, the Cuban Gar requires a brackish tolerant aquarium with a minimum volume of 3785 litres and a tank length of at least 300 cm. Water temperature should be maintained between 22°C and 30°C, with a pH range of 6.5–8 and a general hardness of 8–20 dGH. A moderate water flow is preferred.
The Cuban Gar is a rewarding species to keep, provided its core environmental needs are met. This species is available in 2 varieties: Standard (Adult) and Juvenile (Grow-out). Each may differ slightly in size, temperament, or care needs, so it is worth checking the specific requirements of the variety you plan to keep.
Cuban Gar Habitat Setup
When setting up an aquarium for the Cuban Gar, a moderate water flow best suits their natural preferences. Because this species occupies the surface and mid-level 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 smooth gravel or rounded substrate to protect their sensitive barbels. Keepers should note that a tight-fitting lid is essential, as this species is a known jumper.
Cuban Gar Compatibility Notes
Classified as semi-aggressive, the Cuban Gar is adaptable and can be kept singly or in a small group, offering flexibility when planning a community tank. When choosing tankmates, any fish small enough to fit in its mouth will likely be eaten. Selecting tankmates that favour different water layers from the surface and mid-level zones can help reduce competition and territorial overlap.
Feeding products
We may earn from qualifying purchases
.webp?2026-04-25T14%3A35%3A38.022Z)
Frequently Asked Questions About Cuban Gar
How big does Cuban Gar get?
Cuban Gar (Atractosteus tristoechus) typically reaches a maximum adult size of approximately 150 cm. They have a fusiform body shape and a moderate growth rate.
What tank size does Cuban Gar need?
A minimum aquarium volume of 3785 litres and a tank length of at least 300 cm are recommended for Cuban Gar. This ensures enough swimming space and helps maintain stable water conditions.
What water parameters does Cuban Gar need?
Cuban Gar thrives in brackish tolerant conditions with a temperature range of 22–30°C, a pH between 6.5 and 8, and a general hardness of 8–20 dGH. A moderate water flow is preferred.
Is Cuban Gar peaceful or aggressive?
Cuban Gar is classified as semi-aggressive with an aggression score of 6 out of 10. They can work in community setups but may clash with certain tankmates.
Can Cuban Gar live alone?
Yes, Cuban Gar can be kept singly or in a group. They are flexible and adapt well to both setups.
Does Cuban Gar have any special tank requirements?
Yes. Cuban Gar benefits from smooth gravel (sensitive barbels) in the aquarium. These features help replicate their natural habitat and promote overall health and well-being.
Does Cuban Gar need a lid on the tank?
Yes. Cuban Gar is a known jumper, and a tight-fitting lid or cover is essential to prevent escape. Even a small gap can be enough for a determined fish to leap out.
Plants That Suit Cuban Gar
These plants pair well with Cuban Gar based on shared water preferences, layout fit, and how likely they are to hold up in the same aquarium.
African Onion Plant
Crinum calamistratum
Afzel's Anubias
Anubias afzelii
Amazon Sword
Echinodorus amazonicus
Anacharis
Egeria densa
Anubias Barteri
Anubias barteri
Baby Tears
Lindernia rotundifolia
Fish Similar to Cuban Gar
Florida Gar
Lepisosteus platyrhincus
A prehistoric, heavily armored ambush predator native to the southeastern United States. They possess an elongated, torpedo-like body and a beak filled with sharp teeth. As an apex predator, they will consume any tank mate that fits in their mouths, but are generally peaceful toward fish too large to eat. They require massive aquariums and a secure, weighted lid due to their powerful jumping capability.
Alligator Gar
Atractosteus spatula
A massive, primitive ambush predator native to North and Central America, known for its crocodilian snout and armor-like ganoid scales. They grow to enormous sizes and are strictly for public aquaria or highly advanced monster fish keepers with massive custom indoor ponds. They are air-breathers and incredibly hardy, but their size makes them entirely unsuitable for standard home aquariums.
Cuban Cichlid
Nandopsis tetracanthus
A striking, highly aggressive predatory cichlid native to the rivers and lakes of Cuba. They are known for their spectacular black and white 'mosaic' or 'tiger' patterning, which becomes incredibly vivid during breeding. Best kept by experienced aquarists due to their extreme territoriality, potential size, and need for hard, alkaline water. They are also known to be naturally euryhaline, tolerating brackish conditions.
Cigar Shark (Mad Barb)
Leptobarbus hoevenii
A massive, incredibly active schooling fish native to Southeast Asian rivers. Despite the 'shark' moniker, it is a giant cyprinid (carp). It grows exceptionally large and fast, requiring massive aquariums or heated ponds. Known as the 'Mad Barb' due to its erratic swimming and tendency to jump when startled. They are omnivorous and will eat anything that fits in their mouth, including smaller fish and plants.
Freshwater Shark (Wallago)
Wallago attu
An apex predator native to South and Southeast Asia, infamous for its immense size, huge mouth, and voracious predatory nature. It will consume any tank mate that fits into its capacious mouth and is known to bite aggressively when handled. This species is utterly unsuitable for standard home aquariums and requires an enormous custom pond or public aquarium setup.
Congo Bichir
Polypterus endlicheri congicus
The Congo Bichir is a prehistoric-looking, bottom-dwelling monster fish and one of the largest species in the Polypteridae family. They are obligate air-breathers and ambush predators that will eagerly consume any tankmate small enough to fit in their surprisingly large mouths. Due to their massive adult size, they require extremely large custom aquariums, heavy filtration, and a tight-fitting lid to prevent escapes.