 The mysid has been associated with reduction of zooplankton biomass and biodiversity, while having an opposite effect on phytoplankton.Pelagic fish in many ecosystems have been negatively affected by the species' introduction; however, salmonids and benthic fish seem to benefit from the new food source.The species' routine vertical migration through the water column results in continuous cycling of pollutants, such as heavy metals, that would otherwise be confined to the benthic zone.