
Source: Wikimedia Commons
Platysternon megacephalum
A nocturnal turtle of hill streams with a huge head as thick as the shell is deep and a tail as long as or longer than the carapace. Because the head is so large and the shell so flat it cannot withdraw its head. The carapace reaches 21.5 cm.
Platysternon megacephalum is the big-headed turtle, sole member of its family and genus in most treatments. The carapace is extremely flat and reaches 21.5 cm, while the head is enormous and as thick as the shell is deep; the specific name megacephalum, meaning great head, matches both the English and Japanese names. Because the head is so large and the shell so flat, the turtle cannot draw its head inside. A single large scale covers the top of the head and the horny beak is large and thick. The tail is very long, equal to or longer than the carapace, and strong enough to grip branches. It favours streams about a metre wide and 10 cm deep, is nocturnal and rests by day in rock crevices. It is carnivorous, taking insects, crustaceans, molluscs and fish. A 2025 proposal would raise the Burmese subspecies and the Guangxi populations to full species, making three in the genus.
Source: Wikipedia (CC BY-SA 4.0)
The Big-Headed Turtle lives Maximum recorded longevity in captivity is 27 years.
The Big-Headed Turtle grows to Carapace up to 21.5cm, with males larger than females.
Origin
Southern China, Myanmar, Thailand, Laos, northeastern Cambodia and Viet Nam, in hill and low-mountain streams
Lifespan
Maximum recorded longevity in captivity is 27 years
Size
Carapace up to 21.5cm, with males larger than females
Sources: Wikipedia (Japanese): Big-headed turtle / Wikipedia (English): Big-headed turtle / Reptile Database / AnAge: The Animal Ageing and Longevity Database
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
Accepted name: Platysternon megacephalum Gray, 1831
Synonyms: Platysternum megacephalum Gray, 1831, Platysternon peguense Gray, 1870, Platysternon megacephalum shiui Ernst & McCord, 1987
Authority databases: Reptile Database
Nomenclature follows global taxonomic authority databases.
Listed in CITES Appendix II in 2003, and listed in Appendix I at the family level (Carettochelyidae) effective June 12, 2013. It qualifies as an international rare wildlife species, and individual registration certificates are required for transfers and other transactions. It does not fall under the designated animals listed in the Animal Protection and Management Act Enforcement Order, nor is it designated as a designated invasive species.
Sources: CITES Appendices / Ministry of the Environment: list of invasive alien species / Order for Enforcement of the Act on Welfare and Management of Animals (designated dangerous animals)
Regulations may change. Always verify the latest information with the relevant authorities.
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Temperature
25〜32℃
Humidity
40〜70%
Insects, crustaceans, molluscs, fish, tadpoles and prepared pellets
It does poorly in warm conditions and often stops feeding or declines when the water is too warm. Remember that it lives in hill and low-mountain streams, and keep the water from getting too warm.
It prefers shallow, cool running water, so keep the water shallow and moving with strong filtration. It is sensitive to poor water quality, and very frequent water changes with tap water can bring on fungal skin disease. It climbs using its limbs and tail, so fix the lid securely to prevent escapes.
Carnivorous, taking insects, crustaceans, molluscs, fish and tadpoles. Some captive animals will accept prepared or dried foods.
Bad tempered, it bites hard with a large hooked beak. It cannot withdraw its head, so forcing a restraint is dangerous and it must be handled with great care. House it singly as a rule.
The whole family Platysternidae was moved to CITES Appendix I with effect from 12 June 2013. In Japan the species is therefore an internationally endangered species, and every transfer requires an individual registration certificate. It is neither a designated dangerous animal nor an invasive alien species. Habitat loss and collection for food, medicine and the pet trade have caused a steep decline.
Advanced. This is an advanced-level species. It requires specialized equipment and advanced husbandry skills with precise environmental control.
The average lifespan of Big-Headed Turtle is Maximum recorded longevity in captivity is 27 years. With proper care and nutrition, they can live a long and healthy life.
Big-Headed Turtle typically reaches Carapace up to 21.5cm, with males larger than females as an adult. Size may vary depending on care conditions and individual genetics.
Big-Headed Turtle feeds on: Insects, crustaceans, molluscs, fish, tadpoles and prepared pellets. Aim for a balanced diet with appropriate feeding frequency.
The price of Big-Headed Turtle varies significantly depending on morph, size, and lineage. Check our market price page for the latest pricing information.
Last updated: September 16, 2026