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He suggests a species named Penstemon tenuis, which can take wetter conditions and produces a cloud of violet-purple blooms in late spring.

The candidates for this night's matchmaking are pale brown chunks of the small, spiky, and ubiquitous corals Acropora tenuis and A. loripes.

Last year, her team reported that one group of A. loripes-A. tenuis hybrids tolerated hotter, more acidic water better than purebred A. tenuis, with survival rates 16 to 34 percentage points higher.

David Culver, a professor of environmental sciences at American, said the 7mm crustacean that two graduate students found in the muck of Rock Creek near Coquelin Run turned out to be of the Stygobromus tenuis species.

Using techniques developed by Dr. Hagedorn, they collected and froze sperm and cells from colonies of Acropora tenuis and Acropora millepora, two of the roughly 400 coral species native to the Great Barrier Reef.