Fin's Fish Guide
The Rhombus bitterling (Acheilognathus rhombeus) is a freshwater fish of the family Cyprinidae that grows up to 14 cm.
Description
The rhombus bitterling is a cyprinid (Acheilognathidae) from East Asia. The species has a deep, laterally compressed, silvery body with a rhomboid outline, to which the name refers; courting males colour up. It inhabits calm rivers, ponds and ditches. Its breeding is remarkable: the female lays its eggs with a long ovipositor into the gill cavity of a living freshwater mussel, where the larvae grow up sheltered. As an omnivore it feeds on algae, plant matter and small invertebrates. The species is harmless to humans.
Frequently asked questions
How do you recognise the Rhombus bitterling?
The Rhombus bitterling has a torpedo-shaped body, is mainly silver-grey and shows a plain pattern. Lays the eggs with an ovipositor in the gill cavity of a living freshwater mussel.
Where does the Rhombus bitterling live?
The Rhombus bitterling lives in fresh water and is mostly found around mixed bottom. East Asia; calm rivers, ponds and ditches.
How big does the Rhombus bitterling get?
The Rhombus bitterling grows to a maximum of about 14 cm.
Is the Rhombus bitterling dangerous to humans?
No, the Rhombus bitterling is harmless to humans. None required: this species is harmless to humans.
Is the Rhombus bitterling edible?
The Rhombus bitterling is rarely eaten.
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All data
Identification
Appearance
Habitat & distribution
Behaviour & biology
For anglers
Safety
Status & sources
Same genus Acheilognathus
More from the family Cyprinidae
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Point your camera at the fish and Fin names the species in seconds. Free, and the Rhombus bitterling is one of 12,519 species in the app.