A nickname came easily for this newly discovered species, dubbed the big-mouth catfish by scientists who found it in the highlands of eastern Suriname.

In addition to its gaping kisser, the big-mouth is unusual for its small size, the researchers said.

During their survey of the Surinamese Amazon in 2005, scientists found many species of dwarf catfish, some of which were no more than 2.5 inches (6.3 centimeters) long.

This diminutive specimen likely thrives only in Suriname's high-altitude streams, the experts added.

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