Anyone for jambalaya?

My partner's quick eyes spotted several of these fellas under Ling Gill Bridge ("Look, prawns", she said). On close inspection of the photos they seem to be the American Signal Crayfish as opposed to the native White-clawed variety. Note the ostentatious red claws.

As such they are a threat to our native species (so say DeFRA and the UK Biodiveristity Action Plan) since they are larger, lay more eggs and are more aggressive than our own more reserved, deferential, class-aware crustaceans. Certainly I struggled to separate the little blighters' claws from my anatomy at times. Seems the tentacled chaps have got ideas above their station, by Jove. "Overweight, oversexed and over here" one might say.

Had I realised this at the time it'd have been straight out with the onion, sausage, tabasco, bell peppers, catfish and rice for an al fresco jambalaya.

Anyone for roast grey squirrel with a signal crayfish starter? I'm surprised Jamie Oliver's not already on to it. Perhaps DeFRA and UKBAP should publish recipes.