plants that crayfish won't eat

hi I am asking the crayfish keepers out there if they have any knowledge of which live plants won't be decimated by crayfish. I have been searching the interweb :silly: for a couple of weeks on this topic and have yet to find any-thing more than "mabey java moss and fern" or "try floating plants"

I like the idea of a fast growing floating plant "no3 control" and to dim the aquarium underneath for the fishes.

On a personal note right now i am on a low fund cycle so it is time for research :dance2:. So any info on this issue would be much appreciated especially search querrie strings or links to info or personal info.

thank you for reading this and any help/ info given

Yeah that is about what I figured and, they figured out how to catch floating plants. So it looks like I will need to set up my tank modularly.

I just ordered and recieved some marimo "moss balls" and the crayfish tried to eat them but, though they seemed to like the taste, were unable to eat it. now they push them around. It was hilarious since i got the small balls (1\elieve2") to watch them each try to hoard three then chase the other one for the rest.

Any way for the record 6 1/2" marimo + 2 crawdads orange (p. clarkii i believe) = 6 1/2" extra fuzzy but intact balls.

Duckweed is on my list to try as soon as i get some more funds.