Fishing Rod
The Fishing Rod is an essential item Link can acquire in his quest by assisting Uli find her missing cradle that a monkey in the village stole.
The rod has a bobber type lure and when it sinks down below the waters surface that is an indication that a fish or object has been caught on the line and the player must hold
down to pull the fish/object up to catch it.
This items initial use is to get Sera's cat back inside the shop which improves her mood allowing Link to purchase her goods as well as gifting a half full 
bottle of milk for his effort.
Once the hero empties the bottle or has an empty bottle on hand he can scoop up bait such as 
Bee Larva and 
Worms which he can then attach to the rod in an effort to make fishing easier.
After the 
Coral Earring is acquired the item will automatically attach itself to the rod and can then be used to capture reekfish at Zora's Domain which can then help Link reach Snowpeak.
Trivia
- Humorously the rod is the gag item of the game much like the Bug Net and
Empty Bottle of past games being able to be used to distract Ganondorf which can help the hero land a sneak attack on the unsuspecting gerudo king. - It is possible to catch the bonefish living in Lakebed Temple however it is considered illegal to keep so Link promptly releases it.
- If the player catches the three unique types of fish for Hena the Sinking Lure will appear underwater and can be fished up.
- Attempting to use the lure with Hena will make her take it away since it is considered cheating.
