How concerned should I be about this giant emerald crab?

[sonfahig]

Hi there - relatively new reefer and I’m a little concerned about one of my crabs. He recently molted and is a lot larger than I was expecting. Mostly I’m worrying that he will eat one of my sleeping fish. Tank has only been up a couple months so there is definitely hair algae around to eat and I feed a good amount (likely too much) but he’s still making me nervous. Would appreciate your thoughts!

 

[KrisReef]

I’m not overly concerned with the size of this algae predator. I assume it’s a strict vegan and the biggest concern would be that it might crawl out of your tank and abscond with your weed?

If it does go rogue I would expect to find empty bumblebee snail shells as easy prey if it goes out of bounds. If you start seeing empty shells then you might want to remove it ?

 

[kevgib67]

Nothing to worry about unless you love your gha.

 

[sonfahig]

That makes sense. Mostly just worried about him snacking on a sleepy fish but I wasn’t sure how common that was.

 

[KrisReef]

That makes sense. Mostly just worried about him snacking on a sleepy fish but I wasn’t sure how common that was.

If the fish have entered into their last sleep (dead) then I might expect the crab might do some clean up work? Otherwise, not a worry.