The importance of sponges on coral reefs

Coral reefs are at risk due to climate change, so we often think about the importance of coral. But did you know that sponges on these reefs are doing an awesome job too? They for example recycle carbon and nitrogen, and remove pollution. Learn more: https://medium.com/age-of-awareness/coral-reef-stars-why-sponges-on-coral-reefs-are-doing-an-awesome-job-2908681d71e1

(credit: John A. Anderson on Shutterstock)