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.

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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.

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Daily Invader

Watersipora n. sp.

Watersipora n. sp.

Watersipora n. sp. is a new, undescribed species which was identified from California harbors using molecular methods. Its origin and worldwide range are unknown, but its spotty distribution on the California coast (Oceanside Harbor, San Diego County, to Humboldt Bay) suggestive of being introduced. Aside from the California records, it has been collected from Puget Sound and one location in South Korea. It is an encrusting calcified bryozoan known from rocks, pilings, floats and fouling plates. Because it is a newly identified species, knowledge of its impacts is limited. However, it has been found overgrowing large areas in some bays/harbors and experimental plate data show that the three-dimensional structure created by Watersipora n. sp. may increase local diversity in the fouling community.

Daily Invader for 2024-05-19

Image Credit Joshua Mackie, San Jose State University, California. Image shows a <em>Watersipora</em> n. sp. mass collected from Monterey Bay in 2006.
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