A wildlife conservation charity said white-clawed crayfish, which are an endangered species, have been released into a pond in Devon.
Wildwood Devon, a wildlife park based in Ottery St Mary, said there were only two known surviving populations of the crayfish left in the county.
Education and conversation officer Charly Mead said the creatures, which were rescued two years ago, had been moved into a specifically created site at the wildlife park.
She said 37 of the crayfish had been released into its purpose-built refuge which provided a secure home where the species could “survive and thrive away”.