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 :
Laser Fish | Soul Knight Wiki | Fandom
Laser fish??!-soul knight # 1 - YouTube
Here's a terribly made and argument causing laser weapon tier list : r/ SoulKnight
So my pet tuna can use master spark (screenshot from soul knight the weapon I'm using is called laser fish) | Touhou Project Amino
One Shotting Bosses with the laser fish (not a bug, just a feature) : r/ SoulKnight
Making a Laser Fish From Soul Knight IRL - YouTube
OP GLITCH/BUG* Laser Fish Unlimited Damage! - Soul Knight 2.5.5 - YouTube
finished my lasers tier list- pinned comment as usual :sip: : r/SoulKnight