Just so everyone knows this is what the fish tank is. Not sure but I think it increases one of the stats of all fish weapons: laser fish, fish, heavenly sword e.c.t :
Grilled Laser Fish | Soul Knight Wiki | Fandom
So my pet tuna can use master spark (screenshot from soul knight the weapon I'm using is called laser fish) | Touhou Project Amino
Am somewhat new to Soul Knight, idk if Bomber is better than Snow Ape's longbow. Which do I get (I have a laser fish too but it has wider laser beam and