Absolutely first class. The underwater footage is just amazing. The cuttlefish sequence was stunning.

Your Narration was excellent too, very clear, well spoken and informative and the accent wasn't dodgy at all.
I would have to agree about the music overpowering the narration at times though. First half was fine, but you could do with bringing it down a notch for the second half of the video. But you could still hear what you were saying though

The morph transition worked well too.

Overall I loved it, it kept me interested all they way through.