MOswald & I are going to Australia this summer. He send me this link about dangerous marine life in Australia today. I love #6.
Don’t swim with sharks. Australian coastline is a haven for many sharks and, in particular, for the great white shark and the grey nurse shark. A number of sharks are listed as endangered species in Australia. To keep out of the way of sharks, use common sense and keep away from areas known to be shark infested. Swim with other people and avoid swimming in dirty or turbid water. If you see a school of fish behaving strangely, this may be a indicator of the presence of sharks and you should leave immediately. Avoid swimming in deep channels, with pets, or near people fishing (the bait will attract the sharks).