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

Corymorpha sp. A

Corymorpha sp. A

Corymorpha sp. A. is a very small (2-3 mm height) unidentified hydroid, known only from Point Richmond and Lake Merritt, both in San Francisco Bay, California. It was found in shallow, soft-bottom habitats of variable salinity. We know of no other recent records for this hydrozoan and no impacts have been reported in San Francisco Bay.

Daily Invader for 2022-10-01

Image Credit Encyclopedia of Life via the Creative Commons CC BY-NC-SA 3.0 License. Original image from the Encyclopedia of Marine Life in Britian and Ireland. Please note that the image is of <em>Corymorpha nutans </em>not <em>Corymorpha </em>sp.A.
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