Catching fish will reward you with points added to your overall fishing license progress on the particular fishery.

After earning the required number of points for one of your fishing licenses, it will automatically be leveled up.
At every second level, you can draw a random license bonus.

License bonuses are useful, passive bonuses that work all the time. By drawing a set of bonuses, you will be able to compete at a higher level.Bonuses only work when catching fish which they were designated for, excluding the competition bonus on the fourth slot, which works for every fish caught during a duel. Every bonus works for one fish only, and you can only have one fish type bonus in your Fishing License.Bonuses are divided into groups according to their rarity; rarer bonuses are much more powerful but may require several wheel spins.The first draw on every level is always free. After that, you may try to draw a better bonus, but you will have to pay two pearls for a single draw or 90 pearls for a larger set.

On level 4 of every license, a Competitive Bonus is drawn. This feature works during duels and when catching fish required in events.
You can also upgrade your Fishing License to PRO so that you can draw a bonus at every level.

A Pro License will let you gain experience points 5 times faster than normal and allow you to draw a bonus at every level of the Licence (not every second level, as in the case of the regular Licence). You can level up every fishing license to level 12.