How might a small clownfish move a large chunk of coconut shell over to a sea anemone in a way that creates an ideal space for laying clownfish eggs? This BBC Earth clip from Blue Planet II showcases some Incredible Teamwork From Little Clownfish.

But why is the sea anemone so important that a clownfish would go through such trouble? They have a symbiotic relationship. From wikipedia:

In a symbiotic mutualistic relationship, the clownfish feeds on small invertebrates that otherwise have potential to harm the sea anemone, and the fecal matter from the clownfish provides nutrients to the sea anemone. The clownfish is additionally protected from predators by the anemone’s stinging cells, to which the clownfish is immune. The clownfish also emits a high pitched sound that deters butterfly fish, which would otherwise eat the anemone.

Watch two more stories of symbiosis: Carnivorous Plants and Killer Ants, and the surprising tale of the Clark’s nutcracker and the whitebark pine.

See more videos about...