Leiodon cutcutia
A freshwater pufferfish reclassified from Tetraodon to Leiodon in 2013.
The ocellated pufferfish, Leiodon cutcutia, is a pufferfish from southern Asia, ranging from India to the Malay Archipelago. It lives in both fresh and brackish waters and reaches up to 15 cm in total length. Until 2013, it was placed in the genus Tetraodon.
First described in 1822 by Francis Buchanan-Hamilton as Tetraodon cutcutia from specimens caught in the Ganges River in India, the species spent most of its history in Tetraodon alongside many other freshwater and marine puffers. In 2013, Maurice Kottelat’s review of Southeast Asian freshwater fish revived the genus Leiodon, moving cutcutia into it as the sole recognized species. Later molecular studies have backed this separate placement, confirming Leiodon as a valid, distinct lineage within the family Tetraodontidae.
In the aquarium trade, Leiodon cutcutia appears now and then. A care guide by Macauley Sykes, published through Pufferfish Enthusiasts Worldwide, recommends keeping it in a densely planted tank with plenty of hiding spots and moderate water flow. Ideal water conditions are a temperature of 24–28 °C and a pH around 6.5–7.5. The species is carnivorous, feeding on snails, small crustaceans, and other invertebrates. The guide warns that individuals can be aggressive toward tankmates, so they are often kept alone or in species-only setups. Frequent water changes and strong biological filtration are advised, as the fish is sensitive to poor water quality.
Quick Facts
- Maximum length
- 15 cm TL
- Native range
- southern Asia from India to the Malay Archipelago
- Habitat
- fresh and brackish waters
- First described
- 1822
- Original descriptor
- Francis Buchanan-Hamilton
- Original genus
- Tetraodon
- Current genus
- Leiodon
Facts from the source article.
Lore & Background
The species was first described in 1822 by Francis Buchanan-Hamilton as Tetraodon cutcutia, based on specimens collected from the Ganges River in India. For much of its history it was retained in the genus Tetraodon, alongside a wide range of freshwater and marine pufferfishes. In 2013, Maurice Kottelat’s comprehensive review of Southeast Asian freshwater fishes revalidated the genus Leiodon, transferring cutcutia to this genus as its only recognized species. Molecular phylogenetic studies have since supported its distinct placement, with Leiodon considered a valid and separate lineage within the family Tetraodontidae.
Reader's Guide
Leiodon cutcutia appears occasionally in the aquarium trade. A detailed care guide notes that the species is best maintained in a densely planted aquarium with plentiful hiding spaces and moderate water flow. Reported water preferences for the species in captivity include a temperature of 24–28 °C and a pH of around 6.5–7.5. The same guide describes the species as carnivorous, feeding readily on snails, small crustaceans, and other invertebrates. It cautions that individuals may display aggression toward tankmates and are therefore often kept either singly or in species-only aquaria. Frequent water changes and strong biological filtration are recommended, as the species is sensitive to deteriorating water quality. Its significance lies in its unique taxonomic history as the sole recognized species of Leiodon, a genus revalidated after decades of synonymy, and in its specialized care requirements that distinguish it from more common pufferfish in the trade.
Did You Know?
- Leiodon cutcutia was originally described as Tetraodon cutcutia by Francis Buchanan-Hamilton in 1822.
- It is the only recognized species in the genus Leiodon.
- The species grows to a maximum length of 15 cm TL.
- It is native to fresh and brackish waters from India to the Malay Archipelago.
Frequently Asked Questions
What is Leiodon cutcutia?
Leiodon cutcutia is a small ocellated pufferfish native to the rivers and estuaries of southern Asia. It is one of the few puffer species that thrives comfortably in both fresh and brackish water.
Why was Leiodon cutcutia removed from the genus Tetraodon?
For nearly two centuries it sat in Tetraodon alongside dozens of other puffer species. In 2013, Maurice Kottelat's systematic review of Southeast Asian freshwater fish resurrected the older genus Leiodon and placed this species back into it.
Who first described Leiodon cutcutia and when?
Francis Buchanan-Hamilton published the original description in 1822, naming it Tetraodon cutcutia based on specimens collected from the Ganges River in India.
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