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Amazon Leaf Fish
Monocirrhus polyacanthus
📍 South America
The Amazon Leaf Fish is a masterfully camouflaged predator that resembles a fallen leaf, making it a fascinating addition to planted aquariums. This small, peaceful fish is relatively easy to care for and exhibits intriguing hunting behavior, stalking small prey with remarkable patience. Its unique appearance and behavior make it a favorite among experienced aquarists seeking something different.
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Care Guide
Diet
Amazon Leaf Fish are carnivorous and prefer live foods such as small fish, shrimp, and insects. Feed small live prey 2-3 times per week. They may be trained to accept frozen foods like bloodworms and brine shrimp, though live food is preferred for optimal health and natural hunting behavior.
Behavior
This species is a sit-and-wait predator that remains nearly motionless among plants and driftwood, resembling a fallen leaf to ambush unsuspecting prey. They are generally peaceful toward larger fish but will consume anything small enough to fit in their mouth. They are most active during low-light conditions and prefer heavily planted environments.
Breeding
Breeding Amazon Leaf Fish in captivity is challenging and rarely achieved in home aquariums. They require specific water conditions, dense vegetation, and careful pair selection. Successful breeding typically occurs only in well-established, heavily planted tanks with minimal disturbance.
Tank Mates
May be eaten if small enough; only suitable if fish are large enough to avoid predation
Similar to Neon Tetras; predation risk depends on relative sizes
Similar size and temperament; both prefer planted tanks and low-light conditions
Bottom-dwelling catfish that won't compete for space or food
Small algae eaters that occupy different ecological niche
Will be hunted and eaten; only suitable as live food
Common Diseases
Ich (Ichthyophthirius multifiliis)
White spots on body and fins, rapid breathing, lethargy, flashing against objects
Raise temperature gradually to 28-30°C (82-86°F), perform water changes, use aquarium salt or commercial ich treatment; maintain excellent water quality
Fin Rot
Frayed or deteriorating fins, discoloration at fin edges, lethargy
Improve water quality through frequent water changes, reduce stress, use antibacterial medication if severe; ensure proper tank maintenance
Parasitic Infections
Excessive scratching, visible parasites, weight loss, clamped fins, lethargy
Quarantine affected fish, use antiparasitic medication, perform water changes, improve tank conditions and reduce stress
Bacterial Infections
Lesions on body, cloudy eyes, loss of appetite, behavioral changes, fin deterioration
Improve water quality, perform frequent water changes, use antibiotic medication if necessary, isolate affected fish in quarantine tank
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Quick Facts
- diet
- Carnivore - small live foods preferred
- lifespan
- 5-8 years
- max size
- 8.5 cm (3.5 in)
- tank size
- 20 gallons minimum
- temperament
- peaceful
Water it likes
- ph
- 5.5-7.0
- ammonia
- 0 ppm
- nitrate
- <20 ppm
- hardness
- 2-8 dGH
- temperature
- 75–82°F (24–28°C)