- published: 12 Jun 2012
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An egg case or egg capsule, colloquially known as a mermaid's purse or devil's purse, is a casing that surrounds the fertilized eggs of some sharks, skates, and chimaeras. They are made of collagen protein strands.
Because they are lightweight, they are commonly washed up by the sea, often found at the strandline, the farthest point of the high tide. The egg cases that wash up on beaches are usually empty, the young fish having already hatched out. Furthermore, egg cases are often found in commercial fishing gears like nets and pots, and on the sea floor during surveys using an ROV.
Among the 9 extant orders of sharks, egg-laying is found only in three:
The egg cases of bullhead sharks (Heterodontidae) have spiral flanges that allow them to be wedged inside crevices or into sand.
The bamboo sharks (Hemiscylliidae) and the zebra shark (Stegostomatidae) lay eggs on the bottom, while the other carpet sharks give live birth. The egg cases are oval and covered with adhesive fibers that serve to secure them to the bottom.
We were camping out at Jalama Beach county park, when we discovered a fresh-looking mermaid's purse on the beach. We were quite surprised to find a live baby shark inside. We've picked up many broken or dried ones before, but this was a first for us. Not actually sure whether it's a shark. Could also have been a skate or chimaera.
Whether you call it a "mermaid's purse" or the "devil's pocketbook," odds are you or your children have found one of these fascinating black objects while strolling along North Carolina's beaches. North Carolina Sea Grant marine education specialist Terri Kirby Hathaway tells us more about this beachcombing find and unveils the secret to its animal identity... For other fun ocean facts, check out Terri's blog -- THE SCOTCH BONNET -- online at http://blogs.ncseagrant.org/scotchbonnet
Went to the beach today and there were a ton of shark egg sacs washed up on the beach so I took one and decided to open it up to see what was inside. Let me tell you, it wasn't a shark fetus so DISCLAIMER: if you have a week stomach, do not watch this
Creepy mermaid's purses and recently hatched skates at the museum on Solomons Island, Maryland
D and I found a full mermaid purse!
Skate birth at Siest Key Beach April 2012 mermaids purse live birth
Mermaid's purse at Mystic Aquarium at Mystic, CT
Have you ever found one of these on the beach and wondered what it once contained? Our education specialist Chris Petrone explains.
This is a poem I wrote several years ago, inspired by mermaid's purses i found on the beach at Hatteras. Here's the text of the poem: "Mermaid's Purse" I was also born out of the sea, out of rocky oyster shells and polyphemous waves, Under gulls riding changes in the wind. Tied To coral, to warped twigs in green light, cartilage congealed Into a diamond-winged body, brown above and ghostwhite below, and a trailing tail. Swimmers all of us. What I couldn't see from my point on land I connected To things I recognized. It rained. Water met water, a million drops disturbed The surface. But the fish only feel it when the waves grow heavy enough to drag Them into the air. They feel it always. Even fused to their element They breathe the threat Above. Where I walked gulls ran at the waves, ca...