Talk:Calcareous sponge

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File:Haeckel Calcispongiae.jpg to appear as POTD soon[edit]

Hello! This is a note to let the editors of this article know that File:Haeckel Calcispongiae.jpg will be appearing as picture of the day on August 4, 2012. You can view and edit the POTD blurb at Template:POTD/2012-08-04. If this article needs any attention or maintenance, it would be preferable if that could be done before its appearance on the Main Page so Wikipedia doesn't look bad. :) Thanks! howcheng {chat} 16:34, 3 August 2012 (UTC)

Calcareous sponges
Plate 5 from Ernst Haeckel's Kunstformen der Natur, showing a variety of calcareous sponges, a class of about 400 marine sponges that are found mostly in shallow tropical waters worldwide. Calcareous sponges vary from radially symmetrical vase-shaped body types to colonies made up of a meshwork of thin tubes, or irregular massive forms. The skeleton has either a mesh or honeycomb structure.