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October 18, 2019
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Title Ceylon Green Puffer

Sara Waller

Last Updated



A brief description of the ceylon green puffer.


The ceylon green puffer (Tetraodon fluviatilis) is a brackish water puffer fish found in Sri Lanka , Bangladesh, Myanmar and Borneo.  This fish grows to an adult size of 7 to 8 inches long.  There are no noticeable differences between males and females.


Ceylon green puffers should be maintained in an aquarium of 30 to 50 gallons or larger.  A soft, sandy substrate (CS7538) is a good choice.  Driftwood (ZM2000) and  live or artificial plants may also be incorporated.     


Ceylon green puffers prefer a temperature of 75°F to 82°F, a pH of 7.5 to 9.0, a hardness of 11 to 30°H, and a specific gravity of 1.005-1.010 for juveniles or 1.010-1.025 for adults.  Be sure water is clean and well oxygenated.  Excellent filtration and frequent water changes are a must for good health.  

Ceylon green puffers are brackish water fish, though very young individuals may be maintained in hard freshwater for a short time.  As the fish ages, it should be moved up to brackish or even full saltwater.  


The ceylon green puffer is a generally aggressive and intolerant fish that should be maintained alone.  Its beak-like mouth can easily bite chunks from other fish, or in extreme cases rip them to pieces.  It is also very aggressive towards conspecifics and should never be kept in groups or with other species of puffer.  In rare cases an individual puffer may tolerate other fish that are fast enough to avoid being caught and eaten, such as mollies.



Ceylon green puffers are relatively easy to feed fish accepting appropriately sized frozen and live foods.  Good choices include frozen clams on the half shell (ON8615), frozen silversides (ON1035), and other frozen seafood as well as live snails, crabs, crayfish, and earthworms.  For maximum color, growth, and health these fish will look their best when given probiotics (AL169) in addition to a balanced diet.


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