One way or another, everything ends up in the ocean. That includes antibiotic-resistant bacteria, which are on the rise and endangering human health worldwide. So how do those bacteria affect people who drink a lot of seawater? Researchers from the University of Exeter Medical School intend to find out; they have put out a call for surfers to volunteer for a study focusing on the bacteria in the gut, the BBC reports. For the project, which is being called "beach bums," the researchers will swab the rectums of 300 surfers to investigate which kinds of bacteria inhabit their guts.