Slug

[samyboy]

picked some aquatic plants out the large pond today to give the minnows a more natural tank, washing the plants out in some tank water i found a small slug so far its not gone into the aquarium but ive kept it, should it stay out or will it help clean up, or just multiply and wreak havok? thanks Sam

 

[Torrean]

sounds like a leach to me. keep it out of your tank.