Fishhook waterflea

Cercopagis pengoi

Overview

Photo credit: ©USGS
Cercopagis pengoi
Habitat:
  • It is found in estuarine habitats, lakes, marine habitats, water courses, and wetlands.

Description:
  • This species can only be identified using a microscope
  • When magnified, a unique loop at the end of its tail, as well as a pointed brood pouch which may contain eggs can be seen
  • Please see the Global Invasive Species Database for a more detailed description of this species

Origin and Distribution:
  • Originates in the Caspian, Black and Azov seas and small coastal lakes in this area
  • Considered invasive in Eastern Europe, Baltic Sea, Laurentian Great Lakes and Finger Lakes

Impacts:
  • It is a voracious predator and may compete with other invertebrates and vertebrates
  • Through this competition, C. pengoi has the potential to affect the abundance and condition of fish and fish larvae
  • This species also impacts fisheries by clogging nets and fishing gears

How might it get here?
  • The only described vector for this species is ships ballast water

Is it found in Northern Ireland?
  • It is not found in Northern Ireland.

Prevent Spread:
  • Bait or bait water should not be released into water body or transport from one water body to another.
  • Good containment measures should be followed to control both the spread of adults and resting eggs, which are capable of surviving desiccation and freezing for periods of several years. 
  • Report all sightings.

You can help by reporting any sightings: @ the Centre for Environmental Data & Recording (CEDaR) - Or via the iRecord App.
For further queries, you can contact the Invasive Non Native Species (INNS) Team in the Northern Ireland Environment Agency on 028 9056 9558 or Email: invasivespecies@daera-ni.gov.uk  
Invasive Species Northern Ireland

Invasive Species Northern Ireland