I echo everyone else's comments.
I'm affraid that those two nasty little monsters have gone walkabouts in search of better waters, to be honset you'd have been far better off putting them in the pot and eating them.
American Signal crayfish will decimate a water course once they enter it, they will destroy the native crayfish and unbalance the entire ecosystem within that body of water.
They entered our local stream 8 years ago and ruined it completely, no native crayfish,and hardly any fish left as the signals also wreak havoc with the invertebrate life.
They also do untold damage to the banks by burrowing deep into them causing them to collapse or become far more vulnerable to errosion.
