September 17, 2009 · Uncategorized

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Crabs, shrimp, and lobsters are in the order Decapoda.  Subterranean habitats around the world have their fair share of decapods inhabiting them but I have always been interested in the groundwater shrimp.  North America has a few species and they are all imperiled to differing degrees.  With the cave work that I do, I’ve been excited about photographing any of the native species and I got my chance with Palaemonetes antrorum (family Palaemonidae).  A friend with the United States Fish and Wildlife Service allowed me to photograph a few specimens.  They ranged in size from 1.5-2cm (about 1/2 to 3/4 inches) in total length.  The species is endemic to Texas and the IUCN currently categorizes the Balcones Cave Shrimp or the Texas Cave Shrimp (P. antrorum) as EN (endangered).  After the photoshoot, I had a fair amount of material that I was reasonably happy with.  I’ve posted a number of examples here. 

 

 

 

 

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Pretty much opaque…

 

 

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I noticed that they like to lift their bodies up off the substrate and typically have a leg or two not in contact with it.

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I like that you can see their digestive system through their carapace.

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It is really interesting to watch the guys cruising the water column.

It is really interesting to watch these guys cruising the water column.

Looking down on them...

Looking down on them...

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This is a good example of a shrimp resting on a couple of walking legs while the others are stuck out into the water column.

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I like ventral shots because they tell you a bit about the body plan of the subject.

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Hovering in the water column

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Written by Dante


6 comments on “Texas Cave Shrimp (Palaemonetes antrorum)”

  1. Roberto:

    cool blog


  2. dilandinga:

    I bookmarked this link. Thank you for the good job!


  3. Henry Robison:

    Fantastic shots of these shrimp! Once again your photography brings these animals into perfect view. Great job Dante!


  4. Dante:

    Thanks so much for the great comments. I’ve wanted to see these shrimp for a long time and really enjoyed the photo shoot. I’m captivated by the way these things swim. What great wildlife!


  5. Diane Young:

    Wonderful creatures and brilliant photography! Is this species from Ezel’s Cave?


  6. Dante:

    Hi,

    Yes, Palaemonetes antrorum can be observed in Ezell’s Cave, Texas. Thanks for the comments!

    Cheers,
    Dante


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