Been to both. Both are good for macro, but personally I'd think there is a lot more diversity in Lambeh. There is some reef diving in Ambon, but it's a bit of a boat ride away, if I recall; for reef/wall, I think I would just take a few days off from Lambeh and go to Bunaken/Bangka. Another thing I like about Lambeh is that eth resorts are _much_ nicer (better living, camera rooms, much better food)..
Having acquired a GoPro Hero 4 recently, I am also looking at how to set it up. Right now I have a Sola800 and an AdventureX 1200 making somehting like 2000 lumen, and I am hoping this will work for nearby stuff, say, a trumpetfish at 1m. I fear it will be no use for sharks or schools of jacks etc. I am willing to try with filters (any advice which ones?) before plunging into massive video lights. Appreciate any advise.
Yes, the marlin skeleton is still there -- on the ledge along the cavern (before entering the tomb). I think it was placed there by a DM. I suppose the cavern shelters it from any swells/currents, so it's not moved much, if at all.
But then I started thinking.. there were definitely some narrower cavities (tunnels?) behind one or two of the skeletons where I'm sure we didn't quite poke our heads inside. Maybe there are even some more smaller tunnels inside that we didn't explore at all? This calls for a revisit, I think :-).