There are plenty around at the moment......but unfortunately ......
They are not that great to eat...........

I would imagine that if you covered it with enough wasabi or similar it may be alright.
I find it to be a bit tough and chewy and for fish thats not too good.
Banjo sharks are however great for frightening those who dont know what they are, Pick on up by the tail and tell every one it is a sting ray ( do you best Steve Irwin.... crikey impression ) as you move your legs around as if to dodge the barb then offer others to touch it ..... no one will come forward.
Stick to the Flathead a very very underrated eating fish.