When when an oil spill occurs, it's extremly hard to figure out which major commercial fish species are at risk. A team of scientists at the Mote Marine Laboratory hope to find out, however. At a facility 20 miles inland from the coast of Florida, they're growing adult fish—some of which are up to four feet long—in a series of huge tanks, and are slowly exposing them to oil. They're hoping their experients will show them how various species are affected by oil, both in the short term and the long term. If chemicals in oil affect their genes or their breeding, they say, the future of those species could be at risk.