Summary
Hidden in wet sand, tiny beach isopods swarm anything that stops moving and strip it clean. Deep Look reveals the mouthparts these 'sand piranhas' use to recycle dead animals along the shore.
Viewer safety
Deep Look films tiny creatures in extreme macro close-up, so a squeamish class may find this one intense -- preview if that's a concern.
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Teaching resources
Discussion questions
Talk about it
Beach isopods are small crustaceans with sharp, cutting mouthparts. They gather in huge numbers to eat dead fish and other animals that wash up -- cleaning the beach and returning nutrients, using mouth structures built for scraping and biting.
- What kind of food do these tiny beach isopods eat?
- How do their mouthparts match the job of cleaning up dead animals?
- Why is it helpful for a beach to have scavengers like these?
Quick work-a-long
Vocabulary: isopod, scavenger, mouthparts, recycle.
Try it: Draw the tide line and a washed-up fish covered in tiny isopods. Write how their mouthparts help clean the beach.