The mood of most of your pictures is very nicely captured. I particularly like the way how the background is darkened. It really gives the pictures the feeling of tranquality of the ocean. Keep it up. How do you like your 8080. I heard it is the next bulkiest housing to a DSLR's.
Someone has been telling me that Sipadan's diving condition has deteriated since I last visited in 2003. However, from your pictures, everything looks the same, if not more, with plenty to see. Seems like you had a great time.