Ghost knife and rays

[litigator666]

I have 3 huge ghostknives (about 15-18 inches) and they get along well with my motoros. I also have smaller one (4 inches) and he still seems to be not being bothered by the rays. My knives aren't shy as well and they swim all over the tank and sometimes glide with the rays.

 

[montyblue]

We had a 10-12ish inch BGK and a few leo's in the same tank (biggest one was just a little bigger than a dinner plate), and unfortunately one ray decided the ghost knife looked tasty after not too long BGK never picked on the rays though, so as long as the rays are significantly smaller you might be ok. Maybe....