I had a coral banded shrimp in with army flame hawk for about 12 years. The CBS would come out and wave his arms around, no problems. That said the CBS had a "œwingspan". Much larger than the hawk.
The CBS did disappear back around Christmas. I don't know what happened, but when I searched online, I could not find any documentation of anyone having one thT long. I think the longest other one I saw someone mention was 8 years.
Ironically, about a month later I lost the flame hawk who I'd had almost 19 years to jumping out of the hole in my canopy that my feeder drops into.
I miss both but haven't decided if I want to repeat the combination.
Kim