(4 Pack) Fluker's Color Enhancer Treat - Food for Purple Hermit Crabs 3 Ounce Jar Pack of 4 Fluker's Color Enhancer Treat - Food for Purple Hermit Crabs 3oz Jars Bring out the brightest purple in your hermit crab's coloration Bring out the purple color in the common crab's purple pincher High in anthocyanin, a common blue/purple pigment