A recent inventory disclosed a growing incidence of diseases, including cancers, lesions and tumors in dolphins, turtles and fish. Most recently, some shrimp and blue crab populations have been infected with a flesh-eating parasite, and scientists warn health problems may one day arise in people who use the estuary as well. The increasing appearance of invasive species—such as an Asian green mussel recently found—which can beat out other species for space in the lagoon and erode native diversity. Shrinkage has been documented in the lagoon's rich biodiversity and degradation of its water quality from crystal clear to murky green, which threaten its fisheries and Brevard's tourism industries.