Skip to main content

Asian (Pacific) Shore Crab

Asian (Pacific) shore crab


The Asian (Pacific) shore crab (Hemigrapsus sanguineus ) is a crustacean also known as the Japanese shore crab or Pacific shore crab. It was probably brought from Asia to the United States in ballast water. When a ship's hold is empty, it is filled with ballast water to stabilize the vessel.

The first Asian shore crab was seen in 1988 in Cape May, N.J. By 2001, Pacific shore crabs colonized the East Coast, with populations located from New Hampshire to North Carolina. Crabs live in the sub-tidal zone where low-tide water is several feet deep.

The Asian crab is 23 in (57.7 cm) wide. Shell color is pink, green, brown, or purple. There are three spines on each side of the shell. The crab has two claws and bands of light and dark color on its six legs.

A female produces 56,000 eggs per clutch. Asian Pacific crabs haves three or four clutches per year. Other crabs produce one or two clutches annually.

At the start of the twenty-first century, there was concern about the possible relationship between the rapidly growing Asian crab population and the decline in native marine populations such as the lobster population in Long Island Sound.

[Liz Swain ]

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"Asian (Pacific) Shore Crab." Environmental Encyclopedia. . Encyclopedia.com. 20 Sep. 2018 <http://www.encyclopedia.com>.

"Asian (Pacific) Shore Crab." Environmental Encyclopedia. . Encyclopedia.com. (September 20, 2018). http://www.encyclopedia.com/environment/encyclopedias-almanacs-transcripts-and-maps/asian-pacific-shore-crab

"Asian (Pacific) Shore Crab." Environmental Encyclopedia. . Retrieved September 20, 2018 from Encyclopedia.com: http://www.encyclopedia.com/environment/encyclopedias-almanacs-transcripts-and-maps/asian-pacific-shore-crab

Learn more about citation styles

Citation styles

Encyclopedia.com gives you the ability to cite reference entries and articles according to common styles from the Modern Language Association (MLA), The Chicago Manual of Style, and the American Psychological Association (APA).

Within the “Cite this article” tool, pick a style to see how all available information looks when formatted according to that style. Then, copy and paste the text into your bibliography or works cited list.

Because each style has its own formatting nuances that evolve over time and not all information is available for every reference entry or article, Encyclopedia.com cannot guarantee each citation it generates. Therefore, it’s best to use Encyclopedia.com citations as a starting point before checking the style against your school or publication’s requirements and the most-recent information available at these sites:

Modern Language Association

http://www.mla.org/style

The Chicago Manual of Style

http://www.chicagomanualofstyle.org/tools_citationguide.html

American Psychological Association

http://apastyle.apa.org/

Notes:
  • Most online reference entries and articles do not have page numbers. Therefore, that information is unavailable for most Encyclopedia.com content. However, the date of retrieval is often important. Refer to each style’s convention regarding the best way to format page numbers and retrieval dates.
  • In addition to the MLA, Chicago, and APA styles, your school, university, publication, or institution may have its own requirements for citations. Therefore, be sure to refer to those guidelines when editing your bibliography or works cited list.