UW News
Jacob Allgeier
August 16, 2016
Big fish — and their pee — are key parts of coral reef ecosystems
![The Almaco jack is a large predator fish, pictured here in the Caribbean.](https://uw-s3-cdn.s3.us-west-2.amazonaws.com/wp-content/uploads/sites/6/2016/08/04151443/Almaco-Jack-150x150.jpg)
Large, carnivorous fish excrete almost half of the key nutrients, phosphorus and nitrogen, that are essential for the survival of coral reefs.