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Medusa

medusa

1. The gorgon; or one of the Gorgons whose hair was changed into serpents, after which all who looked upon her were turned into stone.

(Science: zoology) Any free swimming acaleph; a jellyfish.

The larger medusae belong to the discophora, and are sometimes called covered-eyed medusae; others, known as naked-eyed medusae, belong to the hydroidea, and are usually developed by budding from hidroids. See Discophora, Hydroidea, and hydromedusa.

(Science: medicine) Medusa bud A cluster of stars in the constellation perseus. It contains the bright star algol.

Origin: L, fr. Gr.


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Re: Anyone knows what organism is this?

Nice photos. The second one is definitely a coelenterate of some kind. Perhaps the medusa stage of one.

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by skeptic
Tue Jun 21, 2011 1:06 am
 
Forum: Microbiology
Topic: Anyone knows what organism is this?
Replies: 2
Views: 892

Anyone knows what organism is this?

... Oh, and perhaps this one too? I have no idea! Sea-spider maybe not, so I assume this is also a microscopic perhaps medusa of some sort? Or plankton?

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by Alekas
Sun Jun 19, 2011 5:49 pm
 
Forum: Microbiology
Topic: Anyone knows what organism is this?
Replies: 2
Views: 892

Re: animal with the longest lifespan

... animal but natures only error was that made this immortal being so small hehe : Turritopsis nutricula or immortal jellyfish is a hydrozoan whose medusa, or jellyfish, form can revert to the polyp stage after becoming sexually mature. It is the only known case of a metazoan capable of reverting ...

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by master94
Mon Jul 12, 2010 12:25 pm
 
Forum: Zoology Discussion
Topic: animal with the longest lifespan
Replies: 9
Views: 10575

Re: Why Cnidaria swim?

There are many different forms of cnidaria, ranging from sessile corals to mobile jellyfish. The main reason for their mobile forms (including the medusa stage of anthozoans) is dispersal. Sometimes they swim towards the light for other reasons. There is a jellyfish living in a lake in Palau that ...

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by skeptic
Wed Mar 24, 2010 8:41 pm
 
Forum: Zoology Discussion
Topic: Why Cnidaria swim?
Replies: 4
Views: 2422

Why Cnidaria swim?

... swimming stadium among Cnidaria (and also swamps) ? I think the answear is that becouse of a polyp- colony is single- sexual, they have to produse medusa, if they want to get some kind of gentic variation. Am i getting this right, or can somone point me in the right direction? :D Thanks!

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by ManBearPig89
Wed Mar 24, 2010 2:47 pm
 
Forum: Zoology Discussion
Topic: Why Cnidaria swim?
Replies: 4
Views: 2422
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