Thank you very much.

What would that line be made of? Does monofilament come in that
weight?

And is your average trolling rod (assuming a skillful fisherman) able
to handle a 900kg fish? I would be curious if you had a
recommendation.

Would you also need a boat with a strap-in fighting chair, as used for
marlin, etc.?

Thanks for answering a curious neophyte's questions.

Regards,
Matt