About the Data
Species records include data on invasions history, distribution, ecology, impact, and more. These data were gathered from published literature and targeted surveys. All records have undergone expert review, unless otherwise noted.
Species Profiles
NEMESIS includes detailed information on about 500 species of marine and estuarine of invertebrates and algae introduced to the United States. Each record contains information on taxonomy, distribution, ecology, and impacts, as well as references.
Daily Invader
Pectinatella magnifica
Pectinatella magnifica is a freshwater bryozoan which forms large, slimy and gelatinous colonies. Its native distribution spans Eastern North America from New Brunswick and Ontario to Louisiana and Texas. It is introduced in the Western US (Oregon and Washington), Europe (France, Germany and the Netherlands) and Asia (Japan and Korea). It inhabits lakes and rivers and has been found attached to rocks, wood, aquatic vegetation, sponges, freshwater mussels, and other bryozoans. Although freshwater bryozoans can clog fishing nets and foul power plant and municipal water systems, there are no reported impacts of P. magnifica from its introduced range.
Daily Invader for 2025-04-09