Leopard Sea Slugs Crawl Together

Two brown and purple nudibranchs (Risbecia tryoni), crawling in tandem on a surface encrusted with pink-colored coralline algae. These "sea slugs" live in the tropical Western Pacific Ocean. You can learn more about coral reef ecosystems by exploring our Coral Reefs featured story.

Photograph from above of two brown nudibranchs with white-ringed deep purple spots, crawling in a line.
Jeff Dawson

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