Latest from marine invertebrates

How do barnacles make baby barnacles?

April 03, 2013 by Michael Ellis

Barnacles are hermaphroditic -- they contain both male and female sex organs. You're thinking, "Well, they always have a date on Saturday night." No, it's a really bad idea to self-fertilize: Inbreeding results in little genetic diversity. Worms, slugs, snails -- slow-moving animals with low rates of encounter -- are all hermaphroditic. And you could not get any slower than an adult barnacle!

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Brake for Nature

April 01, 2011 by John Muir Laws

Jack Laws says we pass we pass fascinating natural hotspots every day on our way hither and yon. Try stopping between here and there now and then--you may discover biodiversity where you least expect it, just like he did at Brisbane Lagoon off Highway 101.

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Standing the Tests of Time

January 01, 2007 by Gary Brand

Walk patiently along a few ocean beaches in the Bay Area, and you just might find objects of stunning beauty that also provide clues to a lost world, fossil sand dollars that are as much as 2 million years old. These fossils, not shells but skeletons called tests, show up only near Daly City and Point Reyes, so it's a privilege to find intact specimens that have survived the rigors of the coast for many centuries.

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Hidden Treasures of the Harbor

April 01, 2003 by Dennis Anderson

Below the opaque surface of the calm waters of Richmond and Sausalito Harbors lies an unexpected world of curious forms, brilliant colors, and furious competition for a place to hold on.

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