Do Some Sea Slugs ‘Eat’ Sunlight? Unveiling the Astonishing Symbiosis
How do certain sea slugs manage to ‘eat’ sunlight and use it for energy? According to Smithsonian Magazine Science, these fascinating creatures, specifically from the sacoglossan group, have developed an extraordinary method. They achieve this by stealing chloroplasts—the cellular machinery responsible for photosynthesis—from the algae they consume and integrating them into their own bodies.
This remarkable process, often termed ‘kleptoplasty,’ allows the sea slugs to maintain the functionality of these stolen chloroplasts for weeks. This means the slugs can sustain themselves with minimal food intake, deriving energy directly from sunlight. While this capability might sound like science fiction, reminiscent of the ‘astrophage’ from Andy Weir’s ‘Project Hail Mary,’ these sea slugs are very real inhabitants of Earth’s oceans. Their existence highlights the incredible diversity of energy acquisition strategies evolved by life on our planet.