Fish Disease Tips: Set up and use a quarantine tank. This is a small inconvenience that can really save your butt.
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Tetraodon nigroviridis is one of the pufferfish known as the green spotted puffer (the other being Tetraodon fluviatilis). It is found across South and Southeast Asia in coastal freshwater and brackish water habitats. Tetraodon nigroviridis reaches a maximum length of about 15 cm (5.9 in).
Adult Tetraodon nigroviridis are found in freshwater streams, rivers, and flood plains; young are found in brackish water. It is also found in mangrove forests. This is however disputed and the exact habitat of this fish is not yet fully known. Diet consists primarily of snails, but includes small invertebrates such as mollusks, crustaceans, and some plant material. This species may also be lepidophagous.
Tetraodon nigroviridis has the smallest known vertebrate genome, roughly 340 million base pairs, and has thus been selected as a model organism for genetics. In 2004 a draft of its genome sequence was published.
Tetraodon nigroviridis is by no means a food fish, but has some value as bait and is very widely traded as an aquarium fish, and is sometimes mistaken as the Ceylon Puffer, or Tetraodon fluviatilis. Tetraodon nigroviridis also has some degree of value as a lab animal, in particular in the field of genetics, because it has the same number of genes as human beings but in a genome about one-tenth the size.