Planarian flatworms can reproduce by fission, where they tear themselves apart and each piece regenerates into a new worm.

“these worms most of the time reproduce just by fission. They tear themselves apart. So they have a head and a tail. And the part of the head will just tear itself apart from the tail, grow a new one. The head will grow a new tail, the tail will grow a new head.”

“Flatworms have a peculiar characteristic: when sliced in pieces, each piece will grow into a complete flatworm, just like the original one [📹 PBS Deep Look] https://t.co/dZiICIu1sa”