
Source: Wikimedia Commons
Kryptopterus vitreolus
A unique catfish with transparent body showing visible skeleton. Fantastical appearance when swimming in groups.
The glass catfish (Kryptopterus vitreolus) is a freshwater catfish native to rivers of Thailand, Cambodia, and the Malay Peninsula, renowned for its entirely transparent body through which the spine, organs, and swim bladder are clearly visible — one of the most otherworldly appearances in the freshwater aquarium hobby. Growing to 6–10 cm, glass catfish are obligate schoolers: they must be kept in groups of five or more, hovering in mid-water currents in a characteristic stationary formation. Solitary individuals become withdrawn, stop eating, and decline rapidly. Diet favors live and frozen foods — daphnia, bloodworms, brine shrimp — though they can be trained to accept quality dry foods. Slightly subdued lighting suits them best. When a healthy school catches the light at an angle, their transparent bodies shimmering with iridescence create one of the most uniquely beautiful displays in fishkeeping.
The Glass Catfish lives 5-8 years.
The Glass Catfish grows to 8-12cm.
The ideal water temperature for the Glass Catfish is 20〜26℃.
They prefer slightly acidic to neutral water (pH 6.5–7.5) at 22–26°C, with moderate water flow to replicate their natural riverine environment.
Origin
rivers of Thailand, Cambodia, and the Malay Peninsula
Lifespan
5-8 years
Edited & verified by: BreederDirect editorial team
The taxonomic, regulatory, and husbandry data on this page are compiled and verified against the authoritative primary sources below.
Primary sources
Kryptopterus vitreolus is not CITES-listed.
Sources: Seriously Fish / CITES Appendices (Checklist)
Regulations may change. Always verify the latest information with the relevant authorities.
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Size
8-12cm
Temperature
22〜28℃
Frozen food, Artificial feed
Keep in a group (5 or more recommended)
It holds position in mid-water current as a group, so a filter setup that creates flow matters. In weak current it never shows its natural active swimming.
Prefers slightly acidic to neutral water (pH 6.5-7.5) at 22-26°C. Sensitive to water changes, so avoid sudden shifts.
Calm and non-aggressive; pairs well with peaceful small to medium fish. Hiding places help it settle.
Prefers live and frozen foods such as frozen daphnia, bloodworms, and brine shrimp. Dry food is often refused at first but accepted once accustomed.
Often in poor condition right after import, and takes time to stabilize after introduction. It prefers somewhat dim lighting.
Intermediate. This is an intermediate-level species. Some prior experience and knowledge of environmental management are recommended.
The ideal temperature for Glass Catfish is 20〜26℃. Avoid sudden temperature changes and maintain a stable environment.
The average lifespan of Glass Catfish is 5-8 years. With proper care and nutrition, they can live a long and healthy life.
Glass Catfish typically reaches 8-12cm as an adult. Size may vary depending on care conditions and individual genetics.
Glass Catfish feeds on: Frozen food, Artificial feed. Aim for a balanced diet with appropriate feeding frequency.
The price of Glass Catfish varies significantly depending on morph, size, and lineage. Check our market price page for the latest pricing information.
Last updated: August 31, 2026