A catshark embryo, wriggling around in its egg case. ​ "A yolk sac inside the egg case provides the embryo with all the nutrients necessary for its development," the NOAA Ocean Explorer team explained after they captured the rare footage. ​ ​"Egg cases are attached to invertebrates or algae via long strands that coil around a solid base during the few months until hatching. After completing its development, the shark pup will emerge from the case and will be ready to swim in order to maximize it

3.7K views | Found a Praying Mantis egg case hatch right outside my front door! (check in the first comment) | Daily Bread of Life | Facebook

3.2K views · 101 reactions | Catshark egg case A mermaid's purse is a tough leathery pouch that protects a developing shark or skate embryo. This purse contains a baby catshark. | Get Wild | Facebook

10K views · 63 reactions | Look at this beautiful shark egg! 麗凉...

7.3K views · 49 reactions | The CSIRO has launched a citizen science project called the Great Eggcase Hunt Australia, which is supported by the Shark Trust App. Research technician at the CSIRO’s National Fish Collection, Helen O'Neill says it's hoped the information could help researchers better understand different species of shark. | ABC News | Facebook

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