Biologists found that off the northeast coast of a certain country the P-plankton population has recently dropped 10 percent  Additionally, fish species X, Y, and Z are beginning to show extraordinarily high death rates in the region  Since these species of fish are known to sometimes eat P-plankton, biologists believe the two phenomena are connected, but the exact nature of the connection is unknown
No other species in the ecosystem appear to be affected
A new strain of bacteria is attacking P-plankton by destroying their cell walls and is attacking the respiratory systems of fish species X, Y, and Z.