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12-04-13 Huanchaco Beach Peru Beach Finds

by David & Lin
(Huanchaco, La Libertad, Peru)

Here's the big blue sea glass again

Here's the big blue sea glass again

Here's the big blue sea glass again
Nice big blue - although not a lot of glass, Lin found some really NICE ones
Huanchaco, Peru produces these gumdrop beauties
Mermaids Purses - actually shark or skate egg cases. These were fresh and nice. Nice? Hmmm...

~ submitted by David and Lin of OdysseySeaGlass.com in Huanchaco, Peru

Lin and I were at the beach on a very nice day yesterday and found some sea glass as well as the "Mermaid's Purses" shown above.

Actually, I (David) didn't find much sea glass, just three or four small whites.

I find that my eyes are getting worse as I get older in the sense that colors don't jump out at me.

Although I don't notice the pebbles etc being blurry, when I bend over just a little, my eyes seem to distinguish colors much more rapidly. But my back just doesn't handle bending over like that very well.

Anyway, Lin's eyes are six inches closer to the treasures, so she doesn't have to bend over to see the sea glass (that's my reasoning anyway). Not to mention that she is 11 years younger.

Today, however, her neck is really hurting, so when we go to the beach in a few minutes, she'll be doing the spotting and I'll have to the picking up and photos.

The "mermaids purses" shown in the photo above are actually leathery cases containing either:
  • Shark eggs or 
  • Skate (ray) eggs.
Which is it? Consider the following information.

The young sharks of some species, like the dogfish (shark) and the catshark, lay these things and leave them to float in the sea.

The young sharks, "pups," are nourished by yolk in the egg case. Later, one side splits and the young sharks come out to grow up and scare people like you and me.

Wikipedia shows the following photos of and skate casings:


Egg Casing of a Skate


Egg Casing of a shark
Egg Casings of a Small-Spotted Catshark


The British Marine Life Study Society describes the Dogfish (shark) common on England's coasts and includes photos of egg casings similar to ours. 

Jim Hall, the author of the page on Dogfish egg casings states that he has successfully raised sharks from the "pups" he has released from shark egg casings.

On his page, Jim Hall shows photos of several different shark egg casings as well as those from skates. These casings are very similar to the photos above.

Our conclusion?

We've reached the definite and non-controversial conclusion that what we found today is... either the egg casing from a skate or the egg casing from shark.

Perhaps one of our readers can add some information to help us determine which it is.

Happy hunting,

David and Lin Sea Glass


~ submitted by David and Lin Schneider


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Comments for 12-04-13 Huanchaco Beach Peru Beach Finds

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Mar 17, 2014
Treatment of skate egg-cases
by: Martin C. Cadee

The egg cases are empty, so there is no problem to collect them. Only very rare a baby skate is in the egg, in that case you can put it back to the sea (but I think it will beach again), or put it in e seawater aquarium to observe the young raja if it appears.

The empty egg cases can be dried, just in a dry [place , not in the sun, The egg-case will shrink to about 70% of its wet domensions.

The only problem is tha the egg case becomes more brittle.

Therefore I treat the egg case with a 50%-50% mixture of ethanol and glycerol.

It will dry again but is somewhat less brittle. I have egg cases that were foud in 1960 and are good preserved.

If you want to see the original dimensions you simply put the egg-=cae in fresh-water for 24 hours, and it gets almost its original dimensions.

Dry egg-cases can be sent by post, they are not very haevy.

I hope you like the information,

Yours Martin

___________

~ David from OdysseySeaGlass says:

Thanks, Martin, that's good information to know on preserving these egg sacs.

However, I really think that there are babies in there. The sacs are not open. They are bulging and have liquid inside.

I tried to rip open one with my fingers but it was tough like leather and I couldn't do it, so threw it back.

Next time, I am going to take one home and see if I can cut it open.

Thanks again,

David and Lin

Mar 15, 2014
Martin - Mermaid Purses specimen
by: David at OdysseySeaGlass

Hi Martin,

We don't know how to preserve and ship specimens, although it sounds fascinating.

Also, we put those back in the ocean after taking the photos.

We'll try to find some more and then take a series of closer photos for possible identification.

See also:
https://www.facebook.com/InsidePeruTravel

Mar 15, 2014
Mermaid Purses
by: Martin C. Cadée

Quite interesting, that mermaid purses.

Can you collect some specimens for me. I can send you some Dutch mermaid purses back.

I'll try to find literature about the mermaid purses from Peru, so that J can determine from which species they are.

From the Dutch ones this is already known.

Yours,

Martin C. Cadée [mc.cadee (at) casema (dot) nl]

Dec 05, 2013
Wow!!
by: Kay Carruth

I've never seen Mermaid purses....don't know if they are common on the Gulf coast??

Very interesting...

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