Let me say from the beginning, that this is not a decision that I would relish: To eat slugs or starve to death. I've eaten them before, and I hope I never have to repeat that experience. But they will pass for food in a pinch. Terrestrial slugs and snails (found on land, not in the sea) are generally safe for human consumption, always after a thorough cooking. And their nutritional value certainly justifies the effort of collecting and preparing them. These critters have about 90 calories per 100 grams of "meat," which is high in protein (12 to 16 percent) and rich in minerals. It's a little hard to consider them food though, when you realize that their favorite meal is scat.