The number of shark attacks are rising nationwide. Victoria has been fatality free for decades but risks remain. Experts explain what to do if you have a close encounter.

Explainer: A terrifying shark attack on a popular Sydney swimming beach has people asking, are shark attacks getting worse? And what's the reason behind them?

The number of shark attacks are rising nationwide. Victoria has been fatality free for decades but risks remain. Experts explain what to do if you have a close encounter.