John Cancalosi / naturepl
Invasive and Non-Native
Invasive and Non-Native (INNS): first recorded in 1991 and recorded at only a few sites within London. Originally from northern Mexico and southern USA.
Procambarus clarkii
2 years, some can live up to 4
10cm
Burrow more than Signal crayfish, Dark red in colour with a covering of red spots and a black stripe on the top of its abdomen, this species of crayfish are also carriers of the crayfish plague, and are known to outcompete other, smaller crayfish species such as the white-clawed crayfish. They create extensive burrows, even more frequent and complex compared to signal crayfish, and this causes serous damage to river banks. The have a high fecundity and can lay up to 600 eggs at once, but reproduction does not occur under 10°C
Optimal April-October, suboptimal all-year-round.