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.