LM of a Gastrotrichan worm

LM of a Gastrotrichan worm

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Credit: JOHN WALSH/SCIENCE PHOTO LIBRARY

Caption: Gastrotrichan worm. Light micrograph of a gastrotrichan worm. Gastrotrichans are minute, unsegmented fresh-water and marine worms which swim by means of hair-like cilia on their surface. They are hermaphrodite and are probably related to the rotifers and roundworms. They are elongated, flattened and rarely longer than 1 millimetre. The body surface is covered with an external layer which can form plates, bristles and spines. Most gastrotrichans possess glands that make a sticky fluid that used for attaching the organism to objects. Gastrotrichans feed on algae, bacteria and protozoans. Magnification: x70 at 35mm size.

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Keywords: animal, gastrotricha, gastrotrichan, invertebrate, invertebrates, light micrograph, nature, wildlife, worm, zoology

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