Hi Mark,
i remember when you announced your trip in this forum and i was very jealous 
There are some very nice pictures in your gallery, my favorites are the anemone with 2 clownfish, the pipefish and the swimming turtle.
I noticed that some of your pictures (like overhang and turtleswim) are contained twice. Maybe you'd like to order your pics by motive (i.e. all moray eels, all turtles, ...) to avoid showing them twice. It also helps me a lot when i have to decide which pictures will finaly make it into my own galleries.
I don't know what you think about enhancing your pictures but i'd try to get rid of the tail on the right side of the jacks. You probably cannot crop it, maybe try to use the clone tool.
What camera/equipment did you use on your Pemba trip ? Great Spanish Dancer !
Looks like Pemba is another place i'd like to go diving :cool:
Sabine