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WikiProject Animals (Rated C-class, High-importance)
WikiProject icon Echinoderm is within the scope of WikiProject Animals, an attempt to better organize information in articles related to animals and zoology. For more information, visit the project page.
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WikiProject Marine life (Rated C-class, High-importance)
WikiProject icon This article is part of WikiProject Marine life, an attempt at creating a standardized, informative, comprehensive and easy-to-use resource on marine life. If you would like to participate, you can choose to edit this article, or visit the project page where you can join the project and/or contribute to the discussion. This project is an offshoot of the WikiProject Tree of Life.
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Under the Section : Predation _ it said that being stabbed by a sea urchin spine can result in painful death. This is sort of unlikely as spines are not venomous. Being stabbed by a sewing needle could result in a painful death but would not be listed as a likely outcome. I have changed this to painful injury. JD N —Preceding unsigned comment added by (talk) 08:10, 3 July 2008 (OTC)

What is a machaerid? I find no mention of them anywhere else on the web. -puma

Search under machaeridia. This is one of those cases where using the full Latin version of the name might be better...


This is a very useful page. Thanks for creating it

in this:

They have a simple radial nervous system that consists of a modified nerve net (interconnected neurons with no central organs); nerve rings with radiating nerves around the mouth extending into each arm; the branches of these nerves coordinate the movements of the animal. Echinoderms have a brain, although it is very small.

i'm not a biologist, but doesn't a brain count as a central nervous system organ?

No, it doesn't, it is a control organ.

The brain is in fact a part of the central nervous system, though it's odd to hear it refereed to as a "nervous system organ"

that is how cool i am...  :D —Preceding unsigned comment added by (talk) 19:15, 13 May 2010 (UTC)


The page on sea daisies says they are now (as of 2005) considered to belong in the class Asteroid ea. Shouldn't the reference to it as a separate class be removed? -Echnin 03:05, 16 December 2005 (OTC)

It would be interesting and useful to discuss the classification of echinoderms in light of the debate about how closely related Asteroidea and Ophiuroidea, mentioned here and here

What they eat[edit]

What exactly do they eat?

Sea-stars are largely carnivorous, eating a lot of bivalves. Sea urchins are generally herbivorous, feeding on kelp forests. Sea lilies are suspension feeders, sifting through water currents for microorganisms. Sea cucumbers generally eat soil and sift through it for detritus and microorganism, and I believe sand dollars might do the same, but I'm not sure. Finally, I believe the diet of brittle-stars to be more varied, ranging from detritus to filter-feeding to active predation, although, again, I'm not positive on that. I'll try and do some better research and include it in the article. Hope this helps for the time-being. Cerealkiller13 19:54, 2 May 2006 (UTC)

Life Expectancy[edit]

How long do echinoderms live for? FREAK

Wouldn't this question be easier answered in the articles for specific species of echinoderms, since the amongst the many species, the life-span range could be huge? IanUK 13:38, 7 September 2006 (UTC)

Expansion request[edit]

The evolutionary history and origin of Echinoderms surely merits some consideration in this article. Verisimilus T 10:42, 18 June 2007 (UTC)


Could the classification list be merged into the infobox? Verisimilus T 10:44, 18 June 2007 (UTC)

It needs to be redone, entirely. Eleutherozoa is missing, and that's perhaps the only taxon above the classes whose existence and content is not disputed... I have used the Eleutherozoa page to make a short blurb about the 2 hypotehses. Dysmorodrepanis Dysmorodrepanis|talk]]) 06:19, 2 February 2008 (UTC)

The link to "Asteroids" must be corrected to "Asteroidea" or else the readers continue to end up in space. slj 12.05.08 —Preceding unsigned comment added by Sljuul (talkcontribs) 22:14, 11 May 2008 (UTC)

Article expansion[edit]

Hi, I've significantly expanded this article by adding a translation of the German featured article. I've not had time to copyedit it so the writing is in places rough. However the additional information has enhanced the article greatly. The Evolution section still needs a lot of work though! And I've not had time to migrate images in from the German site. Still - an improvement of sorts....

Verisimilus T 19:07, 24 June 2007 (UTC)


This image is now available in Wiki-Commons shoud wish to include it in this entry. It was painted by the very famous natural history and wildlife artist Karen Carr. [1] --Random Replicator 23:46, 13 September 2007 (UTC)

Extraneous Tags.[edit]

Let's remember that inserted reminders are simply suggestions reflecting the opinion of whoever inserted them. They are not integral to the article. Moreover they detract from the quality of the article, reducing it to sort of a "homework" paper, returned for correction. If the inserted suggestions have any merit, then why not make them directly, rather than imposing it on someone else. Meanwhile in closing, calling removing such tags, vandalism, is alot of silly nonesense.J.H.McDonnell (talk) 12:32, 1 September 2011 (UTC)

Better Title[edit]

The title of this article should be Echinodermata which is the proper and scientific name of the taxon which it is about. Echinoderm is a singular and vernacular noun without specific meaning beyond it's immediate use, such as a sea star is an echinoderm. So rather than dummying down, how about smartening up. J.H.McDonnell (talk) 12:42, 1 September 2011 (UTC)

When a taxon has a single, unambiguous common name we use that as a title rather than the scientific name. For examples, see mammal and crown-of-thorns starfish. For more details on animal article naming conventions, see here. --Danger (talk) 15:33, 1 September 2011 (UTC)

Biotic Desert?[edit]

In the third paragraph of the page, there is a link to "biotic desert:"

"The echinoderms are important both biologically and geologically. Biologically, there are few other groupings so abundant in the biotic desert of the deep sea..."

This link takes me to the "Continental Shelf" page, which claims, in its respective "Biota" section, that "Continental shelves teem with life." This sounds like the exact opposite of a biotic desert; however, I am fairly certain the problem is that the biotic desert links to "Continental Shelf" as opposed to abyssal plains or something similar. I'm no expert on this, so I don't want to change it, but it doesn't seem to make any sense as it stands now. — Preceding unsigned comment added by (talk) 04:54, 17 August 2012 (UTC)


Please add the pronunciation of the term "echinodermata". — Preceding unsigned comment added by Yashowardhani (talkcontribs) 03:34, 11 January 2013 (UTC)

Radial symmetry[edit]

Several now extinct lineages included in the Echinodermata were bilateral such as Homostelea,[1] or even asymmetrical such as Cothurnocystis (Stylophora).

  1. ^ Czech Geological Survey (2011). "Homostelea". Virtual museum. 

-Dwergenpaartje (talk) 12:48, 27 January 2014 (UTC)