TIL the Gameboy had a sonar add-on for fishermen, that could locate fish up to 65 feet deep. It also included a fishing mini-game : r/todayilearned

On the Way Games Gone Fishin' – Toysmith

Fishing Game for Kids, Fishing Game

Go to Fish Game Free: A Fishing Game Free: Catch like a Master and Become a Fisherman::Appstore for Android

A Deep Dive Look into Fishing Minigames – The Story Arc

A Look At The Game Boy Fishing Accessory – NintendoSoup

BANDAI Fish Finder Pocket Sonar Game Boy Pocket *UNUSED NEW* Nintendo GB

To play this product, you need a Japanese console or a device that supports the Japanese region. And, It may not be compatible with your country's

BANDAI Fish Finder Pocket Sonar Game Boy Pocket *UNUSED NEW* Nintendo GB

A Deep Dive Look into Fishing Minigames – The Story Arc

Check out this Game Boy peripheral used for… fishing? – Nintendo Wire

Gameboy Fishing Games

Pocket Sonar: Find Fish With a Game Boy!