Abstract
Colomesus is a Neotropical tetraodontid, which currently comprises two species only: the marine pufferfish C. psittacus and the Amazon pufferfish C. asellus. Both are endemic to the north-central South America, with the former occurring along the coast and the latter in several Amazonian drainages, Río Orinoco, Essequibo River, among others. Although the two purportedly valid species can …