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Friday, March 14, 2025

Blue drift lines

  

Looking north along Salmon Creek Beach, with drift lines of By-the-wind Sailors (Velella velella).  There were so many Velella washed up tonight (14 March 20205), the beach looked blue as far as you could see. Here are a couple more views showing the high densities of Velella:


 
 
You can probably see that there were a variety sizes, anywhere from ~1 mm long to 70 mm long.  Below, a photo of small-medium Velella:

 
 
And, a couple of tiny (hard-to-see!) Velella. The first is at the end of Eric's fingertip for scale:

 
And the next one is so small its sail is barely visible:

 
If you've been to the beach lately, I'm guessing you're seeing Velella, too?

P.S.  For an introduction to Velella, see "Below the water line" on 18 March 2014.

6 comments:

Beth said...

Wow!!!! Thanks for sharing - prime conditions between the full moon, tides and winds eh?!

Alan Wight said...

We saw thousands yesterday on a small beach north of Duncan's Landing: https://www.inaturalist.org/observations/265595173

John W. Wall said...

I've been checking Ocean Beach the past few days and haven't seen any!

John W. Wall said...

I might just have not noticed them before, but yesterday I saw that they had indeed landed at Ocean Beach, at least down toward the Cliff House.

Jackie Sones said...

Thanks, John! Good to know where they're showing up!

Jackie Sones said...

Thanks for the record, Alan!