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Starfish

starfish

1. (Science: zoology) Any one of numerous species of echinoderms belonging to the class Asterioidea, in which the body is star-shaped and usually has five rays, though the number of rays varies from five to forty or more. The rays are often long, but are sometimes so short as to appear only as angles to the disklike body.

The ophiuroids are also sometimes called starfishes. See brittle star, and ophiuroidea.

Synonym: sea star, five-finger, and stellerid.


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Re: Mode of nutrition of spider and starfish

Biologists use the term "sea star" not starfish. It's an Echinoderm people!

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by hymenoptera7
Sat Aug 11, 2012 6:14 pm
 
Forum: Zoology Discussion
Topic: Mode of nutrition of spider and starfish
Replies: 5
Views: 6158

Re: Mode of nutrition of spider and starfish

I guess it depends on what definitions one chooses. The term "saprophytic" is not used much anymore but generally refers to the ingestion of dead or decaying organic matter. By this definition, scavengers are saprophytes, which may be one of the reasons why the term is no longer commonly u...

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by wbla3335
Fri Jun 15, 2012 5:36 am
 
Forum: Zoology Discussion
Topic: Mode of nutrition of spider and starfish
Replies: 5
Views: 6158

Re: Mode of nutrition of spider and starfish

I would say that the spider is saprophitic and the starfish is holozoic.

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by wbla3335
Thu Jun 14, 2012 3:47 am
 
Forum: Zoology Discussion
Topic: Mode of nutrition of spider and starfish
Replies: 5
Views: 6158

Mode of nutrition of spider and starfish

What is the mode of nutrition(holozoic, parasitic or saprophytic) of spider and starfish?

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by WilliamY
Wed Jun 13, 2012 3:45 pm
 
Forum: Zoology Discussion
Topic: Mode of nutrition of spider and starfish
Replies: 5
Views: 6158

Quantified similarity between starfish and human DNA

This is only an aside, but I've always loved telling non-biologists that humans are descended from starfish... (well, from baby starfish anyway!) :)

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by Julie5
Sat Nov 13, 2010 1:40 pm
 
Forum: Genetics
Topic: Quantified similarity between starfish and human DNA
Replies: 2
Views: 6995
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