A blood rich strip in fillet of fish
Q: Is the dark red bloodline on fish OK to eat? A: Some species, especially oily fish, have a strip of dark, blood-rich muscle running down the centre of the fillet; it is edible, but has a stronger taste than the paler flesh. ....
sometimes blood line but also bloodline
188.8.131.52 19:17, 5 November 2014 (UTC)