Bloody-red shrimp

Hemimysis anomala


Photo Credit: ©Steve Pothoven, NOAA
Hemimysis anomala
  • Brackish ecosystems with rock sediments.
  • Hemimysis can be found on the benthos during the day and in the pelagic zone at night where it can be observed aggregated in swarms.

  • Hemimysis is a mysid. It is shrimp like in appearance with a curved body, long thin antennae and large bulbous eyes.
  • Adults range in size from 5.5-12.5mm and are deep red to ivory yellow in colour.

Origin and Distribution:
  • Originates from The Black and Caspian Seas.
  • Now found in Russia, Lithuania, Ukraine, Moldova, the Baltic Sea, Poland, Finland, Germany, Holland, Belgium, Scandinavia and England.

Is it found in Ireland or Northern Ireland?
  • It has been reported in Lough Derg and Lough Rea in Ireland and in Upper and Lower Loughs Erne in Northern Ireland.

Static Distribution Map as of December 2019 - Courtesy of CEDaR

How did it get here?
  • The pathway of introduction for Hemimysis to the Island of Ireland is unknown. Any of the following pathways provide a feasible means of introduction: bilge water from leisure craft, water from stocking of imported fish or the aquarium trade; either as live food or associated with aquatic plant imports.

  • Prevent Spread
  • Do not move water from one waterbody to another include bilge water, ballast water, boat toilet water and water in bait boxes.
  • Clean all parts of equipment, boats and trailer that come into contact with the water.
  • Remove any visible plant, fish, animal material and mud from equipment.
  • Do not allow rinse water to return to the environment. Many organisms can remain viable even in small (sometimes microscopic) quantities.
  • Report all sightings to CEDaR.
  • Adhere to the CHECK CLEAN DRY protocols!!!
Invasive Species Ireland

Invasive Species Ireland