During a bloom of Tape seagrass, tiny male flowers float on the water like bits of styrofoam. When several come near one another, they tend to form rafts by sticking in an orderly manner.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/54527470@N00">Ria Tan</a>
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<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/54527470@N00/457347420/">Tape seagrass male flowers (Enhalus acoroides)</a>