Question: are seashells biotic or abiotic?
Answer: Is a seashell an abiotic feature? The definition of "abiotic" is "non-biological." A seashell is made by a living organism, therefore it is biotic. In the sea, shells come from creatures like clams, oysters, mussels, scallops, whelks, conchs, periwinkles, and other sea snails.