Yes, they were feeding fine.
Levels are all good.
Mike has heard of them fighting amongst themselves and picking each other off, so it could just be that, hence me being unsure about topping up the numbers, just to have them kill each other again.
It could be a hitchhiker, but it's been 18 months now, and I've not seen anything dangerous, and nothing has bothered my madarin, or my goby (although I've only had him a week or two) who both sleep on the sand. The goby disapears under the rock at night, like the damsels too.
It's an odd one.