I was once dragged around a french campsite lake by a grassy, Was a boiling hot day and the fish had taken to staying int the middle of a big weed bed with an opening to the main lake. My bro in law & me decided to drift some bread in from an open canoe to see the results, sure enough I kept getting takes and eventualy hooked one - I got it into open water & it dragged us about for 10 mins until we got to shore where I could fight it from the beach, eventualy it & me tired and a lad came with a big carp net & landed it, As I was pondering what the hell this monster 'mullet' was he informed me it was a grass carp & went 18Lb! Fan bloddy tastic fight! thx m8 whoever you were!
Later that year I helped some lads who kept casting for some grasy's on a Dorset trout lake (I now knew what they were!) I gave them some of my sandwich to use as a fly & the lad hooked it on a trout rod! me & the two lads took turns to play it & once we'd landed it a 'fishing widow' in a car nearby came and took some piccys that aparently were in the local paper, I think that one was 15Lb? nearly pulled the poor lad in!
All this has got me thinking of starting the season targeting them!