Alex, I have to confess that I absolutely have no idea where boxer crabs naturally reside but it seems that whenever anyone on the boat mentioned it, the diveguide would start digging around all those loose rocks. I assume that since they are found under the rock, then rocky background ought to be ok 
I do agree though that getting a picture with natural background is better. I do try to get pictures of pygmy seahorse on the seafan with all polyps extended (not always possible but often manageable), crinoid shrimps where the crinoid does not look like it just went through nuclear explosion etc. Somebody on the boat (with envious eyes, I think 
) did mentioned that blue ring octopus tentacles ought to be more straigten out when it swims. Don't know why mine was not but I certainly was not brave enough to try to throw it up from the sandy bottom to get a nice midwater shot 
I am not sure when the boxer crab lost its legs. Looking at the first picture that my divebuddy took, 2 legs were gone already so hopefully it was not during the digging
I am afraid there is going to be a lot more digging for boxer crabs since the article on Lembeh top ten critters article came out on the current issue of Asian Diver.
For the record, I saw 7 of 10, did not bother with bumblebee shrimp since they are easily found in Burma, the pair of Halimeda ghostpipefish were last seen 3 days before I got there but managed to do the disappearing act while I was there and Rhinopias were nowhere to be found even when I tried to go deep.
Drew, I'll remember the Koh Tao DM angle for next time. I was not trying to be too offensive this time 
I think the trick for the frogfish to yawn is not to have too much air in the tank. I camped out twice for yawning pictures and both happened when I was less than 5 bars away from my planned limit before ascending. Next time I will camp out when I only have 30-40 bars left so I won't have to wait so long
