Thanks for the great trip report, I rarely read through lenghy reports but this one i did! . The electric clam you saw at nudi retreat in the crevice was probably the one uploaded in my gallery. Also got a video of it (though probably not as "solid" as yours since it's from a digital camera)
I wonder if we had the same guide - Rafly? He was great and from the way you descibed, seems to be the "joker" from my trip.
If you ever drop by Singapore, let me know and we'll have to meetup. Cheers!