Hylian Loach

The Hylian Loach is an extremly rare fish and notoriously dificult to catch fish in both The Legend of Zelda: Ocarina of Time and The Legend of Zelda: Twilight Princess.

Ocarina of Time
The Hylian Loach was the rarest fish caught at the fishing hole. It was usually caught with the sinking lure, however it was not required. The owner said that it was extremely rare and released it instead of putting it in the tank.

Twilight Princess
In Twilight Princess, loaches can be caught at Hena's Fishing Hole. The only way to catch them is to either aquire a Frog Lure or a Sinker Lure. In Hena's childhood, her favorite book was Hylian Loach: Twilight Fish. She had completly memorized it by Twilight Princess.