So today I leveled up my fishing to 16 but omg, my bags are all full and my 1st retainer is full of crafting items and my 2nd retainer are full of armors and weapons which I don't want to get rid of for my next class leveling. But the thing is, what the heck do I do with the rest of the sea creatures that I caught? I have tons of them and I don't want them to just rot in the retainer.

Should I just sell them or what else are they used for if most of them aren't used for culinary and alchemy? (Btw, I looked up alchemy and culinary recipes to see which recipes uses certain seafoods)