Hi Marlo,

Any more description than that?

If you're lucky, they might be C. orion. I was at Nosara, C.R. near Punta Guiones about 3 years ago and found a beached one.

David Kirsh



      "To stand at the edge of the sea, to sense the ebb and flow of the tides, to feel the breath of a mist moving over a great salt marsh, to watch the flight of shore birds that have swept up and down the surf lines of the continents for untold thousands of year, to see the running of the old eels and the young shad to the sea, is to have knowledge of things that are as nearly eternal as any earthly life can be." -Rachel Carson

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