Do Coral Love Junk Food?

For a long time, scientists thought that coral ate anything they could reach, but a 2017 study indicates that coral might actually prefer plastic. Surprising as it seems, coral may actually find the taste of plastic…well…yummy! A lot like humans, not everything they like may be good for them.

Plastic is the junk food of the ocean.

Coral use chemical sensors that work like taste buds to decide what to eat. When scientists gave coral the choice to eat tiny pieces of plastic or sand, they chose the plastic.

Well, sure. I mean . . . sand? Not even coral would to try to eat sand.

Then the scientists gave coral a choice between plain plastic and plastic coated in a microbial film. They theorized that the film would make the plastic more appealing to the coral.

Nope. Coral still preferred the regular plastic.

Does this mean that that coral can help solve the problem of plastic in the oceans by eating it? No, probably not. First, the size and amount of plastic consumed by coral is minute. Second, the coral can’t digest the plastic, so they eventually end up spitting most of it back out again. Worse, the plastic that the coral does eat might fill their stomachs, preventing them from eating nutritious food.

Junk food is junk, whether it’s on the land or in the sea, so don’t go thinking that throwing your garbage in the ocean is helping coral.  Remember to recycle!


Curriculum Reference Links

  • Earth & Space / Sustainability / 7:  Students should be able to illustrate how earth processes and human factors influence the Earth’s climate, evaluate effects of climate change and initiatives that attempt to address those effects
  • Biological World / Sustainability / 10:  Students should be able to evaluate how humans can successfully conserve ecological biodiversity and contribute to global food production; appreciate the benefits that people obtain from ecosystems
  • Chemical World / Sustainability / 10:  Students should be able to evaluate how humans contribute to sustainability through the extraction, use, disposal, and recycling of materials


Want to Visit Amazing Places?

Your Sponsorship Gives the World to Our Kids

By Sponsoring or Subscribing to Blue Whale Learning, you offer kids in middle and high schools the chance to see the world in new and positive ways.

Blue Whale programs engage students while sparking their curiosity and asking questions designed to help them look at the world, both past and present, in ways that make them really think about how they can impact the future.

While programs are available by subscription, we are proud to join  The Da Vinci Foundation for Innovative Education to make all of our programs available through scholarships and sponsorships for children and schools in need.

If you’d like to support our efforts to distribute all of our programs freely to students in need, please visit The DaVinci Foundation  to learn more about sponsoring, donating or volunteering.