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Description: Move a hand upward and downward in a smooth fashion to imitate a swimming dolphin.
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Using words, please describe the gestures and motions used to make this hand signal.
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Some signals are only used in certain circumstances.
For example, divers will make the universal one-handed "okay" signal when underwater and near their dive buddy, but will touch their head with a whole-arm signal when at the surface and/or at a distance.
Please describe the circumstance(s) in which this signal is used. "Underwater," "On the surface," "At a distance," "In the dark," and "Gloves on" are all good examples.
Signals often vary from region to region, especially for wildlife.
Please enter a region or a list of regions where you have seen this signal used. Regions can be individual states or nations, or entire continents.
If you're unsure, just tell us where you have seen it.