Sea pen - Wikipedia, the free encyclopedia
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Sea pens are colonial marine cnidarians belonging to the order Pennatulacea . There are 14 families within the order; they are thought to have a cosmopolitan distribution in tropical and temperate ...
en.wikipedia.org/wiki/Sea_pen
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Fact sheet with photos on flora and fauna of Singapore's intertidal shores ... You will hurt a whole colony of animals and the small creatures that live on them. What are sea pens? Sea pens belong to Phylum Cnidaria which includes the more familiar sea anemones, hard corals and jellyfishes.
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www.wildsingapore.com/wildfacts/cnidaria/others/pennatu...
www.wildsingapore.com/wildfacts/cnidaria/others/pennatulacea/pennatulacea.htm
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Fact sheet with photos on flora and fauna of Chek Jawa, Pulau Ubin ... During the day, without their secondary polyps, these sea pens look more like sea pencils! Please do not step on or uproot sea pens. You will hurt a whole colony of animals and the small creatures that live on them.
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www.wildsingapore.com/chekjawa/text/g520.htm
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Preferred habitat among sea pens is muddy substrate in sheltered fjords. They live on all depths from 15-20 meters and down. There are registrations as deep as 2600 meters. There are three sorts of sea pens along the Norwegian coast.
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www.seawater.no/fauna/Nesledyr/sjofjaer.htm
www.seawater.no/fauna/Nesledyr/sjofjaer.htm
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Distribution and Life History: Sea pens are colonial corals supported by internal skeletal structures and adapted to living as sessile animals partly imbedded in fine sediments on the sea floor (Barnes, 1980). Spawning may be annual (seasonal) or continual (Eckelbarger et al., 1998). Gametes are released into the...
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www.afsc.noaa.gov/groundfish/HAPC/SeaPens_synopsis.htm
www.afsc.noaa.gov/groundfish/HAPC/SeaPens_synopsis.htm
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Most live in shallow coastal waters, but a few inhabit depths of 12 ... What distinguishes sea pens is polyp dimorphism. One polyp grows very large and loses its tentacles, forming the central axis. The base of this primary polyp forms a bulb which may be expanded or contracted; the sea pen uses this bulb to anchor itself.
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www.unsolvedmysteries.com/usm414166.html
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It is conceivable that sea pens might be adversely affected by high levels of megafaunal bioturbation, perhaps by an inhibitory effect on the survival of small, newly-settled colonies. ... Mobile polychaetes such as Ophiodromus flexuosus, which normally live out on the sediment surface were also seen to enter burrows.
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www.ukmarinesac.org.uk/communities/seapens/sp3_2.htm
www.ukmarinesac.org.uk/communities/seapens/sp3_2.htm
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Sea pens are octocorals. Taxonomically, they are placed in the Order Pennatulacea of the Subclass Octocorallia (= Alcyonaria), in the Class Anthozoa of the Phylum Cnidaria. All of this jargon means they are animals whose major body parts consist ... Very few other macroscopic animals live in the sediments of sea pen beds,
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www.reefkeeping.com/issues/2005-08/rs/feature/index.php
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Anemones, Sea Pens, Coral, Jellyfish, Hydroids, Zooanthids ... Anemones Sea Pens Jellies Hydroids Zooanthids ... Orange Sea Pen; Ptilosarcus gurneyi...
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scuba.huskychemist.org/PacificNorthwestMarineLife/Cnida...
scuba.huskychemist.org/PacificNorthwestMarineLife/Cnidaria/index.htm
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