Some people recommend killing them with boiling water or freezing them and disposing them in the trash. It's important to note that, although it may be tempting, avoid crushing the planaria by hand because since they are asexual, they can reproduce when cut into pieces, which is truly the thing of nightmares!

Does planaria feel pain?

Simple animals such as worms and insects do not suffer pain in the human sense, but they do use nociceptive receptor systems to steer away from potentially damaging conditions. Neurobiologist Marco Gallio, Ph. D., and his team report that planarian flatworms, fruit flies.

Can planaria live forever?

Researchers from The University of Nottingham have demonstrated how a species of flatworm overcomes the aging process to be potentially immortal. ... Planarian worms and their stem cells are somehow able to avoid the aging process and to keep their cells dividing."