HexB - Fish on a Green Day

Katerpillar

Losin the baby weight :-)
I have a tin of Princes Mackerel in a spicy tomato sauce. Can anyone tell me how much fish can be used as a HexB on a green day?

Thank you :D
 
The book says 71g sardines in tomato sauce or 85g pilchards in tomato sauce but no mention of mackerel.

Fresh mackerel is listed - 57g.
 
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