A chained group of pilings that protrude from the muck of a harbor.
They are placed in front of places where damage from ships and barges is likely to occur; such as docks, piers and bridges. These are resting places for sea birds and sometimes sprout weeds and even trees. Mine didn’t have anything on it, so I put a person stepping off into the abyss. To inject a bit of irony, there is a shark fin below.