|Master of the Swamp|
|1999 - 2011|
|Romanized:||Numa no Shu|
|Debut:||Chapter 1; Episode 1 (1999); Episode 1 (2011)|
|Occupation(s):||Guardian of the swamp on Whale Island|
The Master of the Swamp is a giant fish with shrimp-like legs which lives in the swamp on Whale Island. In order to discourage Gon from leaving the island to take the 287th Hunter Exam, Mito lays down the condition that he has to catch the fish by himself first, which he successfully fulfills despite the fact that 5 other grown men on the island failed to do so together.
- The fate of the fish in the manga is unknown, but in the 1999 anime adaptation, Gon releases it back in the swamp after he gets Mito's permission to take the Hunter exam.
- In the 2011 anime adaptation, it is said that Gon is the only person to have achieved the feat of catching the fish since Ging did it at the age of 12.