Caption: A Didinium swims into a population of Paramecium caudatum stabbing one with a needle-like seizing organ. The Paramecium discharges trichocysts, hairlike structures meant to repel a predator, but not known to bother Didinia. Inexplicably the Didinium ends its attack and swims away, leaving behind a deformed and dying Paramecium. Didinia are ciliates and can reach sizes of 150-200 microns. Recorded under Nomarski DIC illumination.

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Keywords: animal-like, animallike, carnivore, cell, cells, cilia, didinium nasutum, didinium nasutum ciliate protozoa, eat, feed, freshwater, hold-fast, hunt, micro, microorganism, organism, paramecia, paramecium, pond, predator, prey, protist, protozoa, seize, single, stab, unicelluar

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Didinium nasutum ciliate protozoa

K002/1715 Rights Managed

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