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View other events for the week of 12/23/2009
Coral Seas
Date Wednesday December 23
Time 7:30 PM - 9:30 PM
Location Details
Humanist Hall
390 27th Street
midtown Oakland, between Telegraph and Broadway
http://www.HumanistHall.org
Event Type Screening
Organizer/AuthorFlorence

The evening begins with an optional social hour and pot luck supper at 6:30 pm,
followed by the film at 7:30 pm, followed by a discussion at the end of the film.

CORAL SEAS

The coral reefs are so crowded that they play host to a perpetual battle for space, even among the coral itself. A coral starts life as a larva that becomes a polyp. Having multiplied, it hardens into a limestone skeleton and grows to form a reef. As the community flourishes, animals develop relationships with one another and such a place can feature a huge variety of ocean life. Although corals feed nocturnally on plankton, sunlight is vital because even though they are animals, each contains millions of single-celled algae. This in turn is the favored sustenance of the humphead parrotfish, whose jaws are so powerful that it erodes much of the reef into fine sand. Algae also grows on the top of the reef and a battle for grazing rights between shoals of powder blue and convict tangs is shown, the former being initially overwhelmed by the latter's weight of numbers before regaining the upper hand. The night-time hunting of a marbled ray alerts other predators and a group of whitetip reef sharks moves in, from which few are safe. Several breeding strategies are examined, including the acrobatic habits of brown surgeonfish and the colorful courtship of the flamboyant cuttlefish. Humpback whales are visitors to the reef and males establish their seniority by the loudness and strength of their song. Being fixed to the seabed, corals must synchronize their reproduction with lunar phases and the rising spring temperatures.

Wheelchair accessible around the corner at 411 28th Street

$5 donations are accepted
Added to the calendar on Tuesday Dec 8th, 2009 7:31 PM

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