Arrow Crab

[MadReefer]

I have an Arrow Crab which I always read were reef safe but would go after slow moving fish, crab, etc. if not well fed.
I feed my tank twice a day sometimes more. This sucker managed to catch my 10" engineer goby last night and its no more
RIP Frank, my wife did not like you at first but you grew on her.
So this morning my wife was up early and saw the crab on my Nepthea swaying back and forth trying to catch other fish.
I never heard of this happening before.
Needless to say it has to go now.

 

[Haus]

Saw this post after the chain gang post for this crab.
What does everyone think about this crab with a pair of clownfish? The female is large-same size as my flame angel, the male is obviously smaller but same age, probably about 3 inches.
65 gallon tank: clownfish, yellow tang, flame angel, large pajama cardinal, falco’s hawkfish, royal gramma.