I once caught a netful of small carp on buttercup petals. Although the day that happened i think i could of caught on anything because whatever i put on the hook the carp were taking it. Still it was comical at the time coz my mate on the next peg was struggling to catch at all..
i have 2 roach on on Wrigley spearmint chewing gum(been Chewed already) i found out they liked it when i threw my chuddy in the canal and i saw alot of small fry trying to take it so i fought i would have ago straight away i ad a 5 oz roach on.
A nasty one but true. Many years ago whilst fishing for crucians in epping forest a huge sneeze led to a big green one. You have to try these things and two minutes later a nice 14oz gold bar in the net. That was one desperate fish (and angler)