3dec051b_Fish_Feeder___Taptitude_Wiki__Fish_trait
[Description] Fish also poops bubbles that can be popped by the player only, in order to stimulate the fish to create extra poop. Doesn't work on betas. Works on Ninjas because Ninjas drop food. [Cost] 1,500xp [Fish trait] 
Surge Bubbles
S p e e d d e m o n
H i g h m e t a b o l i s m
A n o r e x i a
C l o c k B u b b l e s
S u r g e B u b b l e s
K e e n e y e
Fish Feeder - Taptitude Wiki
Fish trait