Is a canoe shell structure?

No, a canoe is not a shell structure. A shell structure is a three-dimensional structure made up of a thin, curved outer shell and a system of internal ribs or braces that support the shell and give it strength. A canoe, on the other hand, is a long, narrow boat that is typically made of a lightweight material such as wood, fiberglass, or aluminum. Canoes do not have a shell structure, but instead have a simple hull shape that is supported by ribs or stringers that run lengthwise along the boat.