If any fish is emblematic of this life cycle—kindergarten in the mangroves, graduate school on the reef—it is the rainbow parrotfish. The scientific name for this species is perfect ...

Reef fish, too, respond to warmer waters—sometimes ... that nibbles back strands of sargassum. And a school of parrotfish—fused teeth like wire cutters—chip away noisily at the rocks ...

Researchers have found that reef fish from the Arabian Gulf, the world's hottest sea, exhibit a higher tolerance to temperature fluctuations compared to those from more thermally stable coral reefs.