No, it's a traditional dish snail stew. They add onions, pimiento, chorizo and white wine. You can buy it in tapas bars, it is simply wonderful. My Spanish neighbour collects them after rain. Snails have to try and get off the wet ground or they drown. You see the walls covered in them.Looks like times are getting really hard here in Spain!
My in-laws feed them flour for several days to fatten them up. They keep them in a plastic washing up bowl (that needs to be washed out regularly) while they get bigger and bigger.If they are the small ones with pale colouring then probably. Perhaps just ask a local. It is funny that you should post this right now as only on Saturday did we have a long conversation with our neighbours who informed us that you can bring them home live and feed them bread. When they then 'ahem' , 'produce' bread you then know the are clean! How good is that! Also the ones in this area are found a lot on the wild anis and accordingly are already flavoured. Bon provecho!