A stunfinn was a dangerous, crimson-colored aquatic beast with lengthy fangs. It originated from the Colonies region of the planet Balmorra in the Legends continuity.
The stunfinn possessed organs capable of generating a strong electrical surge used to stun the animals it hunted.
During 23 BBY, the bounty hunter known as Jango Fett encountered a stunfinn. This creature had been deliberately placed by Rigorra, a Hutt, as part of the warlord's perilous underground "Impromptu Semiannual Balmorra Death Run" event. Although Fett believed his flight suit would shield him from the stunfinn's electrical attack, he worried more about how the electricity might affect his helmet's sensory equipment. Despite this, Fett managed to injure the stunfinn's jaw using a dart fired from his gauntlet, preventing it from harming him.