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Thread: Dear ambiguous invertebrate:

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08-04-2006, 11:11 AM	#6 (permalink)
Boomer Feather Duster Join Date: Nov 2003 Location: Duluth, Minnesota Age: 60 Posts: 249 Karma: 40	Not rerally rick. Sponges are supported by what are called spicules. Spicules are either Siliceous/glass/silica or calcareous (calcite not aragonite). Spicules are the supportive structure of sponges There are many group types of spicules, a key to sponge ID. The crown, if that is what I think you mean, is called the osculum. Spicules will be more dense in this area to make the osculum opening more rigid. Here is a simple biology page sponges Images of spicules sponge spicules - Google Image Search A drawing of a simple sponge _________ Boomer Want to Talk Chemistry ! The Reef Chemistry Forum http://www.3reef.com/uploads/1BoomerWWW.jpg If you See Me Running You Better Catch-Up An explosion can be defined as a loud noise, accompanied by the sudden going away of things, from a place where they use to be.

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