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Fish Freshwater Care: medium Semi-aggressive

Guyana Leaffish

Polycentrus schomburgkii
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Other names: Schomburgk's leaffish, Polycentrus
Group: Oddballs and specialty fish · Family: Polycentridae · Origin: Northeastern South America — coastal waters of Trinidad, Venezuela, Guyana and Suriname

A small ambush predator with a dark brown body decorated with light spots, which looks tailless because its rear fins are transparent. It grows to 8–10 cm and hunts small fish and shrimp at night.

Will it suit my tank?

Last updated October 16, 2026

Temperature
22–28°C
pH
6–7.5
Hardness
2–12 dGH
Adult size
9 cm
Minimum tank size
80 liters
Social structure
Pair
Swimming zone
Middle
Diet
Carnivore
Breeding
Substrate spawner

Water parameters

Temperature22–28°C
pH6–7.5
General hardness (GH)2–12 dGH
Recommended range
Eats small fish Eats shrimp Suitable for planted tanks

Overview

October 16, 2026 · Suggest an edit

The Guyana leaffish is a small ambush predator recognized by the light-colored spots on its dark brown to blackish body. The rear parts of its dorsal and anal fins and its tail fin are almost transparent, so the fish looks tailless in the water. It hides among plants during the day and hunts at dusk. It gets used to frozen foods more easily than the Amazon leaffish.

Tank Setup

October 16, 2026 · Suggest an edit
  • At least 80 liters for a pair.
  • Dense plants, roots and caves; dim light and floating plants.
  • Soft to moderately hard, slightly acidic or neutral water; weak flow.
  • A flat-roofed cave or pot for breeding.

Diet

October 16, 2026 · Suggest an edit

Carnivorous. Bloodworms, brine shrimp, mysis, small worms and small live fish. Most individuals get used to frozen foods over time.

Behavior and Compatibility

October 16, 2026 · Suggest an edit

Calm but predatory; it eats small fish and shrimp that fit in its mouth. During the breeding season the male defends his cave and guards the eggs.

Good companions: calm species too big to fit in its mouth: medium-sized tetras, the larger dwarf cichlid species, Corydoras.

Avoid: small schooling fish, shrimp, fast and aggressive species.

A short profile for this species

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Tank mates

This list is calculated automatically from the species profile and grows as new species are added to the catalog. Try it in the planner for a definite answer.

Usually compatible

Should not be kept together

Hobbyist notes

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Change history and contributors
  1. Page created · October 16, 2026