Credit: DENNIS KUNKEL MICROSCOPY/SCIENCE PHOTO LIBRARY

Caption: Animated coloured scanning electron micrograph (SEM) of a fossilised marine sponge spicule from Oamaru, New Zealand. 3-D star shape. Sponge spicules are found in most sponges. They act as the structural support of sponges and deter predators. Spicules can be found in a wide range of symmetry types. They can be made of calcium carbonate, silica dioxide or spongin. Spicules are formed by sclerocytes, which are derived from archaeocytes. There are 4 main types of spicules: monaxons, triaxons, tetraxons and dendroclones.

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Fossilised sponge spicule, SEM

K006/9290 Rights Managed

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Duration: 00:00:10

Frame size: 1920x1080

Frame rate: 25

Audio: No

Format: QuickTime, Photo JPEG 100%, progressive scan, square pixels

File size: 224.5M

Original

Capture format: Digital Rostrum

Frame size: 2647x3301

Codec: JPEG

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