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Ornate tetra — AI-generated side-view illustration

Ornate tetra

Megalamphodus bentosi

A dark high dorsal fin above a pale pink-silver body

Mature males develop extended dorsal and anal fins; younger fish and females have shorter fins.

Adult length
Up to 4.3 cm (standard length, without the tail fin)
Water temperature
20–28 °C
pH
5–7.5
Hardness
1–12 dGH
Native range
Native to the Amazon River basin.
Natural habitat
Sluggish tributaries, side channels and forest lakes with submerged wood and vegetation, usually in brown-stained, low-mineral water.

Use mature, stable water and prevent organic waste accumulation.

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Appearance and identification

Rosy tetras and whitefin trade labels can be confused; neither a shoulder mark nor white fin tips identify it alone.

Same-species behaviour

Keep a mixed group of eight to ten or more, with room for male display and hierarchy.

Space requirements

Allow a 90 × 30 cm base with shaded retreats and swimming space.

Diet and feeding

Rotate appropriate dry, frozen and live foods.

Compatibility limits

Assess male competition and companion behaviour.

Aquarium environment

Plants, wood and subdued light provide shelter.

Sources

www.fishbase.se ↗ 2026-10-25

www.seriouslyfish.com ↗ 2026-10-22

researcharchive.calacademy.org ↗ 2026-10-22

www.ichthyologie.de ↗ 2026-10-22

www.seriouslyfish.com ↗ 2026-10-22

ftp.tbs-aqua.com ↗ 2026-10-22

bwaquatics.com ↗ 2026-10-22

www.fishbase.se ↗ 2026-10-22

www.aquariumglaser.de ↗ 2026-10-22

PeekFish · Ornamental fish

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