Hydra Oligactis
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Scan day: 04 March 2014 UTC
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Description: Rosemarie Arbur has made a series of drawings of a hydra devouring a water flea.
Drawn to scale with one another, these images tell everything but the time. "Before" was 5:00 p.m. of the day after I'd brought the hydra home, examined it, and put it in a jar of water well populated by water fleas. "After" was midnight, only seven hours later. The hydra caught the daphnid at 5:20. By 5:25 the hydra's mouth had expanded noticeably, covering about half of one side of the prey's carapace. By 5:40 the hydra's mouth had closed, and the hydra's body sagged downward with the weight of its meal. When I checked at 10 o'clock, the hydra's position and appearance had not changed. At midnight, I found a noticeably larger hydra; its bud and the bud's tentacles had grown, too.
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| Page title: | Hydra Oligactis Stretches |
| Keywords: | Microscopy, Micscape, amateur microscopy, protist, Hydra oligactis |
| Description: | Hydra eats Daphnia [micro-organisms] |
| IP-address: | 98.138.19.143 |