Quagga Mussel

Quagga Mussel

(Dreissena rostriformis bugensis)
*Established in Michigan*
RESTRICTED IN MICHIGAN

Report this species:

Use the Midwest Invasive Species Information Network (MISIN) online reporting tool 

- Or - download the MISIN smartphone app and report from your phone - http://www.misin.msu.edu/tools/apps/#home

 

Identification:

  • Quagga mussels can reach 2 inches
  • Quagga shells are more rounded and fan-shaped and won’t sit flat on the ventral side
  • Colors vary - shell color ranges from almost white to tan or brown, usually have darker concentric rings but are not always pronounced

quagga mussel
Amy Benson US Geological Survey Bugwood.org

quagga mussels
GLERL-NOAA

Habitat: Freshwater lakes, rivers, and reservoirs. Quagga mussels can attach to hard or soft substrates in water depth up to 130 meters.

Diet: Mussels are filter feeders that consume algae and phytoplankton in the water.

Native Range: Quaggas are native to areas in the Ukraine and the Ponto-Caspian Sea.

Local Concern: Prodigious filter feeding removes a substantial amount of particulates and phytoplankton. In turn, this decreases food for zooplankton, increases water transparency, and leads to an accumulation of pseudofeces. Pseudofeces accumulation creates foul environments. There is also an economic cost associated with mussel attachment to pipes and other underwater structures.

Means of Introduction: Ballast water from transoceanic vessels

Status and Strategy for Zebra and Quagga Mussel Management This document provides in-depth information about Zebra and Quagga Mussels in the State of Michigan including identification, distribution, management, and control options.

Information Sheet about Zebra and Quagga Mussel (printable PDF)