Unlike smithing's use in improving items, fishing is used primarily to improve one's stats. Fish can improve anything from one's recovery, to their health/WP regeneration, and special types of fish can even be used to directly improve one's stat gains. Here's a list of the fish you may encounter!
FISH LIST: COMMON: Small Fish- only provides a small boost to health regen Medium Fish- provides a small boost to one's recovery and health regeneration Large Fish- provides a small boost to one's recovery, health regeneration, and willpower regeneration. UNCOMMON: Mana Fish- Gives you a certain amount of mana (currently ranging from 30,000-500,000) Gold Fish- Gives you a certain amount of resources (currently ranging from 30,000-500,000) RARE: Magic Fish- provides a boost to one's recovery, health regeneration, and willpower regeneration, while also capping every stat. LEGENDARY: BP Fish- provides a boost to BP gains, and even allows one to go past the BP overcap by a small amount Stat Fish- provides a boost to stat gains, allowing someone to push their stat overcap by a considerable amount. Energy Fish- provides a boost to energy gains.
Fishing can be slow. Fortunately, there are fishing rods to help out with that! RODS: Old Rod- a small boost Good Rod- a considerable boost in speed Super Rod- a SUPER boost in speed. That's it for fishing so far! Have fun driving the Kanassan race to extinction!