Hundreds of mutant crayfish have invaded a cemetery in a Belgian town.
These shellfish don’t normally live in nature. They were created by German pet traders.
But the crayfish escaped from the pet traders, and have colonised a historic graveyard in Antwerp.
They have dug down a metre into the ground.
The crayfish are all female and they have been bred to constantly reproduce – without males.
So, they continue to grow and spread.
“It’s impossible to round up all of them. It’s like trying to empty the ocean with a thimble,” said Kevin Scheers, an environmentalist.
The crayfish can travel across land and water and eat everything.