A perfect set for aquarium substrate and decoration. - Product Name: Super-compressed mat specifically for hermit crabs - Product Name: All-purpose hermit crab food, 40g - Accessories: Sea sponge, shells, stones, driftwood, and other decorations Thank you for viewing. This is a hermit crab breeding set. The sea sponge, mat, and food are new. The shells and coral are used items. With this set and a container, you can start breeding immediately. I have been keeping hermit crabs for several years. For anyone who can use them. I am also listing on other sites, so I will check the stock. Thank you.