Crazy this, Loch Ken is Scotland is crawling with them, its an ecological disaster apprently, they are burrowing in banks ruining game fish spawning grounds and eating all the coarse fish eggs but to trap them you need a licence, and trapping them is the only way of population control. Its illegal and you can apprently be prosecuted for trapping them without a licence, you'd think they would open it up and make it a free for all to help sort the population out. Before i knew it was illegal we set a net up for fun, i know ignorance is no excuse and the forum cannot support this beviour but we caught a few boiled them and ate them, it was pretty easy and they were pretty tasty. I think some nice jamalayas etc could be made if you could get a trapping licence, it would be worth maybe a little paperwork headache.