Articles

Deep below the ocean’s surface, some corals emit an otherworldly glow called fluorescence, but for years, scientists have wondered about the purpose of these glowing colors. Among the hypotheses biologists have proposed is that fluorescence might optimize photosynthesis, shield against the sun’s radiation, protect plant-eating marine life that lives among the corals, or attract algae that live inside the coral and provide them with energy through photosynthesis. Now, researchers have come up with a different hypothesis: fluorescence attracts the plankton that corals capture and eat.

Many people have heard the cry “Save the whales,” but these massive creatures aren’t the only marine mammals at risk of disappearing. In fact, the smallest of the whales, the vaquita porpoise, is on the verge of extinction: just 10 individuals are estimated to remain in the world. Fortunately, those 10 appear healthy—as long as they can continue avoiding a specific fishing practice that continues illegally.

Scientists discover dozens of new fish every year. Most often the biologists who identify these species are from a handful of wealthier countries that have the resources needed to conduct extensive marine research. Now a gorgeous fish found in the Maldives sets two new precedents: it’s the first to be described by a local Maldivian researcher, and it’s the first organism whose scientific name is derived from the local Dhivehi language.

As any parent or teacher knows, a roomful of kids suddenly going silent could mean trouble. As it turns out, coral reefs have their own soundscape, and a quieter reef may also suggest trouble.

Scientists can monitor a reef’s changes by eavesdropping on the sounds made by its inhabitants. This approach provides more information than visually observing the reef or calculating coral coverage, and it tells biologists more about the reef’s health.