A new study reveals that clownfish have developed a remarkable survival strategy during marine heat waves: they physically shrink their bodies. This adaptation allows them to cope with the stress caused by elevated ocean temperatures. Researchers found that the ability to shrink not only helps clownfish endure heat stress but also allows them to maintain their relationship with breeding partners, further enhancing their chances of survival. As climate change leads to more frequent and severe heat waves in the ocean, understanding how these fish adapt is crucial for their conservation.