Flounder can be used as verb to mean to thrash around like a fish (e.g. struggling) - so either could work in context. http://public.wsu.edu/~brians/errors/flou

Flounder can be used as verb to mean to thrash around like a fish (e.g. struggling) - so either could work in context. http://public.wsu.edu/~brians/errors/flounder.html http://public.wsu.edu/~brians/errors/flounder.html