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

Cool Phone Hacks And DIY Phone Case Ideas That Will Save Your Money