Foxfire:
Didn't weigh it, so no idea. My mates and I have ordered a couple of those fish-gripper gadgets from the States, with in-built scales. That should cut down on the lies a bit when they arrive!

Had another piece for dinner tonight, not bad at all.

I remembered that Western Australians also call them "bald-chin", and Yes: he did indeed have a bald chin! The text-books seem to prefer Blue Tusk Fish, and Yes: he did indeed have tusks too!