Fishing is a skill in Unturned 3.0 that allows the player to catch fish from water sources using a fishing rod, and then cook or eat the fish raw. Fishing also has the potential to provide other benefits, such as obtaining Pearls from Oysters.
To start fishing, the player will need to find a body of water with Fish swimming in it - Lakes, Oceans and Rivers are all good sources. Once the player has found a suitable spot, they can equip their fishing rod (found under the Tools tab in their inventory) and select Cast from the radial menu. The player will automatically start reeling in once a fish has been hooked, and must then use quick reflexes to click on the Reel In option that appears in order to successfully land the catch. If the player takes too long to reel in, or if they click on anything else before clicking Reel In, their line will snap and they'll lose their lure - meaning they'll have to find or craft another one before being able to try again.
Once a fish has been caught, it can be cooked by holding down the 'use' button while standing near a Campfire or Grill; alternatively, it can be eaten raw by selecting Eat from its radial menu. Eating raw fish will provide less of a food value than cooking it would, but sometimes circumstances may warrant eating them anyway - for example, if there's no wood available for fuel at a campsite. It should also be noted that certain types of fish (such as Salmon) can only be eaten raw - trying to cook them will result in an error message telling the player that they cannot be cooked any further.