Crayfish take over Berlin park
25 August 2017 Last updated at 14:27 BST
Crayfish may look a bit like a cross between a lobster and a prawn.
They are causing problems in Berlin.
Locals have seen the fresh water creatures lurking around the lakes of Berlin's Tiergarten.
They have even been roaming the pathways of the park.
Protection officers believe that the Crayfish arrived in the lakes after private owners tried to get rid of them.