Speed reads

Sea cucumbers, scavengers of the seafloor that resemble the cylindrical vegetable, have been consumed as a delicacy in Asia for centuries. But in recent decades, they’ve been severely overharvested to a point that they are now quite rare. New research I helped conduct suggests their repopulation could play an important role in protecting and revitalizing another type of endangered marine organism: corals. Coral reefs are in decline around the world partly due to diseases, some of which are associated with sediment on the seafloor. In several field experiments involving corals in Moorea, French Polynesia, and around Palmyra Atoll, research scientist Cody Clements and I, along with two other colleagues working on marine microbes, found that sea cucumbers grazed and consumed bacteria in the sediment, and that sea cucumber presence prevented pathogens from sickening co-occurring corals. We learned this by either removing sea cucumbers from certain sand patches, while leaving...