I got a box set of movies a couple of days ago(Oceans Alive) and other than looking like it is made as an 80's porn it is very informative. They did a full size experiment in which they took a small reef in the Caribbean and spent days removing all the cleaners wrasses and shrimp etc. Within I believe it was two weeks the reef had suffered greatly. Most the fish had left the others had parasites. I fell asleep at this point and can't report as of yet if the returned the cleaners but i will watch the rest later.