Here's a breakdown of the materials and construction:
* Netting: The main component is a thick, woven nylon mesh with large mesh sizes to allow smaller marine life to pass through.
* Floats: Buoys made of plastic or polystyrene keep the net suspended at the surface.
* Weights: Lead or concrete weights are attached to the bottom of the net to keep it anchored in place.
* Anchors: These are used to secure the net to the seafloor.
Some nets also incorporate steel cable to further reinforce the structure, especially in areas with strong currents.
It's important to note that there are different types of shark nets used, each with slight variations in their construction and materials.