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
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Botrylloides violaceus
Botrylloides violaceus is native to the Northwest Pacific from northern Japan to southern Korea and northern China. It has been widely introduced to the Northeast Pacific, the Northwest Atlantic, and parts of the Northeast Atlantic. On the West Coast of North America, it was first discovered in Santa Barbara, California in 1966 and has since spread along the coast from Mexico to Alaska. On the East Coast, it was found in New England in the late 1970s and can now be found from the Chesapeake Bay to Newfoundland, Canada. It is a common fouling organism throughout much of its introduced range. It frequently displaces other fouling organisms, including native and introduced tunicates, bryozoans, barnacles, and mussels through competition for space and food.
Daily Invader for 2023-11-15