A seagrass species from the Red Sea is outcompeting the native seagrass species in the Caribbean, where the green sea turtle lives. These iconic turtles are seeing their grazing areas decline, because they have little interest in the foreign seagrass. Wageningen researchers and colleagues from other research institutions discovered how these large underwater grazers seem to dig their watery grave with their own eating behaviour. The Journal of Ecology for this week reports on the topic.