Like a shipwreck or a jetty, almost anything that forms a structure in the ocean, whether it is natural or artificial over time, collects life.
My first reaction to finding Robert Smithson's Spiral Jetty in a book was, Wow, what a great photograph! I could not believe that someone had gone to so much trouble just to end up with a picture.
Beware of privilege. It stinks of rotten rotten fish heads, many of which were lapping the shore beneath the jetties.