There was a segment in Blue Planet II where they showed an infestation of sea urchins devastating a kelp forest. It turned out that because the predators that k

There was a segment in Blue Planet II where they showed an infestation of sea urchins devastating a kelp forest. It turned out that because the predators that kept sea urchins in check--the sea otter--was over-hunted. I somehow suspect that the starfish infestation here might stem from a similar issue.