Tuesday, September 28, 2010

Tuesday Treasure

Another natural treasure today!! Beach combing down in NSW (can't remember where) when I was little, my Mum and I discovered these weird looking seaweed-like pods. We knew what they were right away because Mum had bought one years beforehand. Port Jackson Shark eggs!
Each female lays 10 - 16 eggs during winter and spring, anchoring them into rocks in shallow waters no more than 5 meters deep.
They are screw-shaped and are literally screwed down into the rocks!The Port Jackson shark embryo develops in these spiral egg cases over 12 months. When the pup hatches out they're only 24cms long, and they head to nursing grounds in amongst long sea grass.Port Jackson Sharks are amazing, gentle creatures. You can read all about them here.

9 comments:

Jo in TAS said...

Awesome finds! Now I've even learnt something new!!

marina said...

Love it!

Peg - Happy In Quilting said...

I have not seen anything like this before...another of your awesome treasures...

teresa said...

I've never seen this before Amanda.. How ingenious of the sharks! I see a theme developing here on your Tuesdays treasures..... but they are treasures that's for sure. xx

Melody said...

That's one of the most amazing things I've ever seen. I love the things you share.

Kim said...

you have quite the collection of natural treasures-very cool

Janice said...

Well, I never knew that. A great treasure to find.

Mistea said...

Treasures for sure. Nature is just amazing - think I should probably take more lessons from her.
Thanks for sharing

val said...

nifty...and so pretty! I've seen 'mermaid purses' but these are really unique