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
Fish species X, Y, and Z are all experiencing widespread starvation within the affected region, and the loss of P-plankton is driving their death rates up even higher.