Diamond the Fish

 is a Trophy item that can be obtained through.

Obtaining
 is obtained by getting the Master Trophy Fisher title, which can be obtained by fishing up every Trophy Fish on the. It can be claimed from after reaching the requirements.

Trivia

 * The lore of the item could be a reference to the lyrics of the song Diamonds by Rihanna.
 * The original lyrics are Shines bright like a diamond where diamond is replaced with fish.