Ambastaia sidthimunki

Dark lines form a chain-like pattern; compare adults with A. nigrolineata rather than relying on juvenile markings.

Adult length: Up to 5.5 cm (standard length, without the tail fin)
Water temperature: 20–30 °C
pH: 5.5–7.5
Hardness: 1–12 dGH

Small size does not make solitary keeping suitable; provide a social group, cover and sufficient floor space. Reports on nipping and aggression differ, so do not label it unconditionally peaceful. A planted aquarium may be considered with feeding, snail/shrimp risks and long-fin risks stated explicitly.

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Appearance and identification

Dark lines form a chain-like pattern; compare adults with A. nigrolineata rather than relying on juvenile markings. Compare fish at the same life stage: adults of this species retain a conspicuous chain pattern, whereas A. nigrolineata has more dominant longitudinal lines.

Floor and movement space

Seriously Fish recommends a 80 × 30 cm base. Assess adult group size, shelter and layout separately; this is not a stocking guarantee.

Aquarium environment

The source gives genus-level guidance that soft-leaved plants may be eaten. Retain shelter and floor space; safety for ornamental snails and shrimp is not guaranteed.

Diet and feeding

Offer varied, suitably sized prepared food and frozen or live small animal foods, with suitable plant foods. Snail-eating does not replace feeding.

Same-species behaviour

Seriously Fish recommends at least five or six, preferably ten or more; this is social-group guidance, not the aquarium's stocking limit.

Sources

www.seriouslyfish.com ↗ 2026-10-22

aquaticarts.com ↗ 2026-10-22