Like hard-working farmers, corals cultivate and eat their resident algae
https://www.science.org/content/article/hard-working-farmers-corals-cultivate-and-eat-their-resident-algae
Excerpt: ...How do vibrant corals flourish in often-barren ocean landscapes? Known as the Darwin Paradox, this mystery has continued to puzzle generations of oceanographers. A new study published today in Nature offers a solution. According to its authors, corals make up for nutrient scarcity by harvesting and feeding on their resident algae, like hungry farmers....