Episode Details

Scientists have uncovered an incredible secret hiding in plain sight on coral reefs. Some tropical sea sponges are able to harvest sunlight through microscopic algae living inside their tissues, giving them a surprising source of energy. It is a discovery that challenges what we thought we knew about one of the ocean's oldest animals.

In this episode, we explore how these ancient filter feeders use a partnership with algae to survive and thrive in nutrient-poor tropical waters. You'll learn why this relationship is similar to the one that helps corals build reefs and why researchers believe sponges play a much bigger role in reef ecosystems than previously recognized. Sometimes the most important discoveries come from the animals we pay the least attention to.

If we want to protect coral reefs, we need to understand every species that helps keep them functioning. This new research reminds us that even the simplest-looking organisms can have extraordinary abilities and may be far more important than we ever imagined. Follow the podcast for more weekday ocean news that helps you better understand our blue planet.