sea pen

Home > ... > Plants and Animals > Animals > Zoology: Invertebrates > ...

Essential reading Compare
side-by-side A Dictionary of Zoology A Dictionary of Zoology The Columbia Encyclopedia, ...

sea pen

sea pen long, slender colonial organism of the same phylum as the jellyfish. Sea pen colonies are formed by several genera of the order Pennatulacea. The colony consists of a stalk formed by an organism called a primary polyp (see polyp and medusa ) and short branches formed by secondary polyps. The stalk, embedded in sand or mud, holds the colony upright. Sea pens differ from the closely related sea pansies and sea feathers by the form of the colony. Sea pens are marine organisms; they are found on Atlantic and Pacific coasts in shallow to moderately deep water. Some reach a length of 2 ft (61 cm) or more. They belong in the phylum Cnidaria , class Anthozoa, order Pennatulacea.

Create a link to this page

Copy and paste this link tag into your Web page or blog:

Give this article a thumbs-up on StumbleUpon

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

MLA
Chicago
APA

"sea pen." The Columbia Encyclopedia, Sixth Edition. 2008. Encyclopedia.com. 10 Nov. 2009 <http://www.encyclopedia.com>.

"sea pen." The Columbia Encyclopedia, Sixth Edition. 2008. Encyclopedia.com. (November 10, 2009). http://www.encyclopedia.com/doc/1E1-seapen.html

"sea pen." The Columbia Encyclopedia, Sixth Edition. 2008. Retrieved November 10, 2009 from Encyclopedia.com: http://www.encyclopedia.com/doc/1E1-seapen.html

Learn more about citation styles

sea pen

A Dictionary of Zoology | 1999 | | Â© A Dictionary of Zoology 1999, originally published by Oxford University Press 1999. (Hide copyright information) Copyright

sea pen See ANTHOZOA; and PENNATULACEA.

Create a link to this page

Copy and paste this link tag into your Web page or blog:

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

MLA
Chicago
APA

MICHAEL ALLABY. "sea pen." A Dictionary of Zoology. 1999. Encyclopedia.com. 10 Nov. 2009 <http://www.encyclopedia.com>.

MICHAEL ALLABY. "sea pen." A Dictionary of Zoology. 1999. Encyclopedia.com. (November 10, 2009). http://www.encyclopedia.com/doc/1O8-seapen.html

MICHAEL ALLABY. "sea pen." A Dictionary of Zoology. 1999. Retrieved November 10, 2009 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O8-seapen.html

Learn more about citation styles

Pennatulacea

A Dictionary of Zoology | 1999 | | Â© A Dictionary of Zoology 1999, originally published by Oxford University Press 1999. (Hide copyright information) Copyright

Pennatulacea (sea pens; class Anthozoa, subclass Octocorallia) An order of colonial octocorals that have an elongate primary polyp embedded in mud on the sea-bottom. The distal end of the primary polyp bears secondary polyps, usually on lateral branches. The polyps are supported by a calcareous or horny skeleton. They are known first as fossils from Cretaceous and Tertiary strata, and with uncertainty from the Silurian. The order contains two suborders, 14 families, and about 40 genera.

Create a link to this page

Copy and paste this link tag into your Web page or blog:

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

MLA
Chicago
APA

MICHAEL ALLABY. "Pennatulacea." A Dictionary of Zoology. 1999. Encyclopedia.com. 10 Nov. 2009 <http://www.encyclopedia.com>.

MICHAEL ALLABY. "Pennatulacea." A Dictionary of Zoology. 1999. Encyclopedia.com. (November 10, 2009). http://www.encyclopedia.com/doc/1O8-Pennatulacea.html

MICHAEL ALLABY. "Pennatulacea." A Dictionary of Zoology. 1999. Retrieved November 10, 2009 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O8-Pennatulacea.html

Learn more about citation styles

Free newspaper and magazine articles

	A.T. Cross Develops Digital Pen for New ThinkPad TransNote; Pen Computing Group Providing Digital Pens For New ThinkPad TransNote As Part of Its OEM Strategy. Business Wire; 2/28/2001
	Maturation process of broodstock of the pen shell Atrina pectinata (Linnaeus, 1767) in suspension culture.(Report) Magazine article from: Journal of Shellfish Research; 8/1/2009
	Ask AP: Black boxes in planes, presidential pens News Wire article from: AP Online; 6/5/2009

Facts and information from other sites

Related articles from newspapers, magazines, and more

	Charnia and sea pens are poles apart Magazine article from: Journal of the Geological Society; 1/1/2007; ; 700+ words ; ...at the base of the frond in sea pens, but at the apex in Charnia. The growth mode of sea pens is thus one of segments added...homologized between Charnia and sea pens. We take this to imply that...unlikely that Charnia was a sea pen. This new method of analysing...
	FAMOUS WHALE SHOW OFF SEA PEN TO FREEDOM Newspaper article from: Post-Tribune (IN); 3/3/1998; 505 words ; ...floats Mondya in front of a pen that will be used to re-introduce...his halfway house to the open sea. The group that rescued the...unveiled a scale model of the sea pen that will be used to adapt...to be able to move him to the sea pen by this fall," Hammond...
	Foundation shows off floating sea pen for famous whale News Wire article from: AP Online; 3/3/1998; 434 words ; ...design for his halfway house to the open sea. The group that rescued the ``Free...years ago unveiled a scale model of the sea pen that will be used to adapt the killer...hoping to be able to move him to the sea pen by this fall,'' Hammond said...
	Cliff-enclosed Iceland bay picked as site of Keiko's sea pen News Wire article from: AP Online; 6/16/1998; 449 words ; ...whale and his football field-sized sea pen as part of his odyssey from nearly a...captivity to eventual freedom in the open sea. Klettsvik, a bay near the southern...in small quarters atop the floating sea enclosure, will monitor the whale around...
	SEA PEN TO REINTRODUCE KEIKO TO OCEAN UNVEILED.(News) Newspaper article from: Seattle Post-Intelligencer (Seattle, WA); 3/3/1998; 324 words ; ...design for his halfway house to the open sea. The group that rescued the ``Free...years ago unveiled a scale model of the sea pen that will be used to adapt the killer...Foundation. The $350,000 floating pen will be placed somewhere in the North...
	Northwest Briefs: GOP admits to some spending violations--Applewick named to appeals court seat---Iceland by a picked for Keiko's sea pen---Sex-ring Newspaper article from: Yakima Herald-Republic; 6/17/1998; 700+ words ; ...fall. Iceland bay picked for Keiko's sea pen NEWPORT, Ore. - A cliff-enclosed...whale and his football-field-sized sea pen as part of his odyssey from nearly...captivity to eventual freedom in the open sea. Free Willy Keiko Foundation spokeswoman...
	Sea Cruz; PEN'S LOOKING SWELL IN SURF.(Features) Newspaper article from: The Mirror (London, England); 1/2/2007; 305 words ; ...movie Volver. But it looks like she won't need any help making waves in 2007. fiona.cummins@mirror.co.uk CAPTION(S): MAKING WAVES: Pen hits swell on boogie board and frolics in bikini Pictures: BIGPICTURESPHOTO.COM/MATRIX
	High seas pen in Superferry again Newspaper article from: Honolulu Star - Bulletin; 12/29/2007; ; 570 words ; ...straight day of service today because of high seas, and they delayed tomorrow's schedule to allow time for the sea to calm. "Same reason," said Terry...director of business development. "The sea conditions, those are the reasons...Pailolo Channel between Maui and Molokai. Sea conditions are ...
	Sea cruisers pen metaphoric monikers.(Sports)(Outdoors) Newspaper article from: The Washington Times; 1/22/1996; ; 700+ words ; ...craft. Californian Dale Gillespie's 25-foot Bayliner says "Midlife Cruises" on the back. There also was a boat with "Sea Vous Play," others with "Seas The Moment," "Liquid Plumber" (it was owned by a plumber), "Penman Ship," "Forget Me Naut" and "Naut To Worry...
	Lookout Fire Company parade marches through a sea of flags: In Pen Argyl, the Labor Day event is as big as any holiday celebration. Newspaper article from: Morning Call (Allentown, PA); 9/5/2006; 700+ words ; ...is like the Fourth of July in Pen Argyl. That's because the...company or marching group saw a sea of waving flags. "The hardest...This year was the first time Pen Argyl police used surveillance...World War II, Kuster came to Pen Argyl to live with his grandparents...