Yellowtail Barracuda
One of the most impressive sights on a tropical reef is a large Barracuda with its big grin of razor shark teeth - they can grow up to 1.8 metres in length.
We have our own Barracuda here in Sydney too. Admittedly they're not quite so big and scary. But they're still Barracudas, our Yellowtail Barracudas.
We never used to notice them before we knew they were Barracudas. But now that we know, we have a whole new respect.