We're wrapping up Tiny Critter Week with a reprise of one of our favorite episodes — nudibranchs. In this episode, Maddie and Emily got super nerdy, diving into the incredible world of nudibranchs. These sea slugs eye-catching for their colors, and some of them have evolved to "steal" abilities from other organisms — from the power of photosynthesis to the stinging cells of their venomous predators.

We'd love to hear which tiny critters you love — and which leave you puzzled. Reach us by sending an email to shortwave@npr.org.

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