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

Hydroides elegans

Hydroides elegans

serpulid tubeworm
Hydroides elegans is a serpulid tubeworm. It was originally described in Sydney, Australia and is now widely distributed around the world. Its origin is unknown, but is presumed to be somewhere in the Indo-Pacific. It is considered introduced on both sides of the Atlantic, the Mediterranean Sea, the Northeast Pacific (California-Mexico), Hawaii, Japan, Russia and New Zealand. Like other serpulid worms, it secretes a calcareous tube on hard surfaces such as rocks, corals, mangroves, shells, pilings, floats and ship's hulls. It is an abundant fouling organism in many warm-water harbors, settling on maritime structures and possibly competing with other fouling species. In some areas of its introduced range it interferes with oyster settlement and causes extensive mortality.

Daily Invader for 2021-11-28

Image Credit John Lewis, Australia Defense and Science Technology Organization, creative commons (CC BY 3.0 AU) license.
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