Fish
Tiny Bass
Small Bass
Bass
Deepling Filet
Green Perch
Starfish
Marlin which can be transformed to a
Marlin Trophy
Mechanical Fish
Northern Pike
Rainbow Trout
Sandfish
Stockfish
Salmon
Northern Fishburger (Hot Cuisine item, but has a fish in it!)
(Not a fish, but I wanted to list if you don't mind)
Goldfish Bowl
Quest items-
Fishnapped Goldfish
Corned Fish
Some rubbish-

Fishbone

Remains of a fish

Fish Tail
Fish themed items from Tibia store that you need to purchase with Tibia Coins-
Fish in a tank
White Shark Trophy
Anglerfish Lamp
(Please note, there's also a lot of Pirate themed items you can get through the Tibia store. I didn't want to list them here as you asked specifically for fish items!)