I don't know if fellow granulosa keepers have experienced this, but mine bark. I found this a bit odd because I've never come across this in any text I've read about them. This occured while transferring them from their 55 gallon home to a temporary tank while I was modifying their set-up. I snagged them out of the water by hand and half of them proceeded to make a bark sound. It sounded like a low-toned Bombona orientalis call, but it wasn't continous- just a "hmmm". Has anybody else experienced this?