Cercopagis pengoi (Ostroumov, 1891)

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English Fishhook waterflea Status LU: absent.
Lëtzebuergesch Kaspesche Waasserflou Status Eur.: established.
Français n/a RA: ISEIA: B0, Alert List. Harmonia+: n/a.
Deutsch Kaspischer Wasserfloh Wikipedia: Wikipedia - English - Fishhook waterflea Wikipedia - Français - Nederlands | Wikispecies: Wikispecies - Cercopagis pengoi
Nederlands n/a Back to the list of invertebrates

Report the species

Report Cercopagis pengoi to the National Museum of Natural History.

Brief description

Cercopagis pengoi is a voracious predator which feeds on zooplankton and competes with native species. The species appears on the list of “One Hundred of the World’s Worst Invasive Alien Species” as defined by the Global Invasive Species Database (Lowe 2004, Luque et al. 2014).

Source: Wikimedia Commons (original file was cropped to show only this species). Arrow points to the thoracopods (feeding appendages).

See also the copyrighted picture at cabi.org

Status and distribution in Luxembourg

The species has not yet been documented for Luxembourg (MNHNL, iNaturalist & GBIF 2020).

Risk assessment

ISEIA protocol

B0 (2+2+3+3) = Alert List (Ries et al. 2017: 68).

Harmonia+ protocol

Not assessed yet.

Worldwide distribution


  • CABI, 2019. Cercopagis pengoi. In: Invasive Species Compendium. Wallingford, UK: CAB International. URL: www.cabi.org/isc [accessed 2020-03-13]
  • Lowe S., M. Browne, S. Boudjelas, M. De Poorter, 2004. 100 of the World’s worst invasive alien species. A selection from the Global Invasive Species Database. The Invasive Species Specialist Group (ISSG) a specialist group of the Species Survival Commission (SSC) of the World Conservation Union (IUCN).
  • Luque, G.M., C. Bellard, C. Bertelsmeier, E. Bonnaud, P. Genovesi, D. Simberloff, F. Courchamp, 2014. The 100th of the world’s worst invasive alien species. Biol Invasions 16: 981-985. doi:10.1007/s10530-013-0561-5
  • MNHNL, iNaturalist & GBIF, 2020. Cercopagis pengoi in MNHNL-mdata, online portal combining species observation from Recorder-Lux, iNaturalist and GBIF. National Museum of Natural History, Luxembourg. URL: https://mdata.mnhn.lu [accessed 2020-03-13]
  • Ries, C., A. Arendt, C. Braunert, S. Christian, A. Dohet, A. Frantz, G. Geimer, M. Hellers, J. A. Massard, X. Mestdagh, R. Proess, N. Schneider & M. Pfeiffenschneider, 2017. Environmental impact assessment and black, watch and alert list classification after the ISEIA Protocol of invertebrates in Luxembourg. Bull. Soc. Nat. luxemb. 119: 63-70. [PDF 360 KB]

 Page content last updated on 2020-04-28. Last proofread by Caroline Grounds on 2019-12-05.