Today were going to look at one of my favourite fish - the shark.As you know, sharks have a reputation for being very dangerous creatures capable of injuring or killing humans, and I'd like to talk about sharks in Australia.Sharks are rather large fish, often growing to over ten metres and the longest sharks caught in Australia have reached sixteen metres.Sharks vary in weight with size and breed, of course, but the heaviest shark caught in Australia was a White Pointerthat weighed seven hundred and ninety-five kilograms - quite a size!Sharks have a different structure to most fish: instead of a skeleton made of bone, I hey have a tough elastic skeleton of cartilage.Unlike bone, this firm, pliable material is rather like your nose, and allows the shark to bend easily as it swims.
