Fishes without (Raw) in their names are decoration. This includes starfish, coral, and shells. Most players become rather annoyed when catching these, but some enjoy putting their trophies of the sea in their home.
Fishes are divided in 15 rarity levels. The rarest is level 15, the least rare level 1. Catching a rare fish doesnt mean it gives a lot of hunger, but often it does, such as for the zebra turkeyfish and the football fish. There are also 2 Legendary Fish in the game, which are extremly hard to see and even harder to catch.
There are currently 51 different fish to be caught on Stranded.