AMSA issued a safety alert aims to raise awareness on the risks posed by dangerous marine fauna. Australian waters contain a range of dangerous fauna that secrete toxins, inject venom, release or contain poison, harbour dangerous bacteria, give electric shocks or just have sharp teeth. Some can become aggressive once disturbed.
An unwanted encounter with any of these dangerous fauna can happen without warning, so it is essential that you, your crew and passengers are prepared.
Dangerous fauna...
https://safety4sea.com/amsa-alerts-on-risks-posed-by-marine-fauna/