Editing Zooplankton (section)

====Radiolarians====
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  | header            = Radiolarian shapes
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  | footer            = &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; Drawings by [[Ernst Haeckel|Haeckel]] 1904 (click for details)
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  | image1    = Haeckel Phaeodaria 1.jpg
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  | image2    = Haeckel Stephoidea edit.jpg
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[[Radiolarian]]s are unicellular predatory [[#Marine protists|protists]] encased in elaborate globular shells usually made of silica and pierced with holes. Their name comes from the Latin for "radius". They catch prey by extending parts of their body through the holes. As with the silica frustules of diatoms, radiolarian shells can sink to the ocean floor when radiolarians die and become preserved as part of the [[ocean sediment]]. These remains, as [[#Marine microfossils|microfossils]], provide valuable information about past oceanic conditions.<ref name=Wassilieff2006b>Wassilieff, Maggy (2006) [http://www.TeAra.govt.nz/en/photograph/5138/radiolarian-fossils "Plankton – Animal plankton"], ''Te Ara – the Encyclopedia of New Zealand''. Accessed: 2 November 2019.</ref>

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File:Mikrofoto.de-Radiolarien 6.jpg|Like diatoms, radiolarians come in many shapes
File:Podocyrtis papalis Ehrenberg - Radiolarian (30448963206).jpg|Also like diatoms, radiolarian shells are usually made of silicate
File:Acantharian radiolarian Xiphacantha (Haeckel).jpg|However [[acantharian]] radiolarians have shells made from [[strontium sulfate]] crystals
File:Spherical radiolarian 2.jpg|Cutaway schematic diagram of a spherical radiolarian shell
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| video1 = [https://www.youtube.com/watch?v=5rxwn6vT9JE Radiolarian geometry]
| video2 = [https://www.youtube.com/watch?v=tl_onFMjJWA Ernst Haeckel's radiolarian engravings]
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