||A structure on the shore of a harbor where ships may dock to load and unload cargo
or passengers. A wharf is usually a fixed platform, often on pilings. Smaller and
more modern wharves are sometimes built on flotation devices (pontoons) to keep them
at the same level as the ship—even during changing tides. Wharves form attachment
surfaces for shellfish and sessile epifauna, and they are common aggregation points
for fish. Also, wharves are often locations where contaminants are introduced into
the environment (through spills or waste disposal).