I grated it using the normal sized holes that I would use for carrots - other holes in grater looked like zesting holes.
It ended up with hundreds of little fibres like tiny fish bones.
Am I sposed to pick them out - I didn't and it didn't seem to affect the curry - but it did stay in a lump in the sauce that I had to tease apart.
I was going to grate a lot and then freeze - but wasn't sure about the fibres.