Serrasalmidaefreshwater fishintermediate

Myloplus Rhomboid

Myloplus rhomboidalis

Also known as: Myloplus Rhomboid, Rhomboid Silver Dollar

Origin: Amazon and Orinoco basins, South America

M

Water Parameters

Temperature2428 °C
15 °C35 °C
pH5.57.5
49
GH (Hardness)212 °dGH
0 °dGH30 °dGH
KH (Alkalinity)06 °dKH
0 °dKH20 °dKH

Quick Stats

Max Size
25 cm
Min Tank
500 L
Lifespan
8-12
Swimming Level
middle
Schooling
Yes (5–15+)
Diet
herbivore
Temperament
peaceful; active schooler

About

Myloplus rhomboidalis was reclassified from Myleus in recent years following molecular study. It presents a clean rhomboid body profile in silver with subtle warm iridescence and is found across the Amazon and Orinoco drainages. Behaviourally and in care requirements it is nearly identical to its Myleus relatives.

For collectors interested in the taxonomy and diversity of the Serrasalmidae, assembling a mixed school including both Myleus and Myloplus species creates an educational and visually compelling display. Both genera thrive under the same conditions.

Not subject to piranha restrictions.

Care Guide

Water: 24-28°C, pH 5.5-7.5, soft to moderately hard; adaptable within these parameters. Tank: Minimum 500L; open swimming space; tall format; avoid soft-leaved plants. Feeding: Herbivore; spirulina products, blanched vegetables, quality pellets. Breeding: Egg-scattering species; rarely bred in home aquaria. Compatibility: Peaceful; ideal for mixed serrasalmid schools or large South American community tanks.

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