RASCOE: So first of all, I know that the scientific term for this ocean layer is the mesopelagic zone. Ken Buesseler has been studying this process as a senior scientist at the Woods Hole Oceanographic Institution in Massachusetts.
Scientists estimate their movements capture billions of tons of carbon every year and stash them in the ocean depths so they don't heat up our atmosphere any more than we are already doing. But it turns out fish have been combating climate change all along - specifically, fish from the so-called twilight zone of the ocean, the layer of the ocean that's between 200 and 1,000 meters deep. Heads of state from around the world are at an international summit in Dubai this month trying to figure out solutions to the climate crisis.