Underwater

Considering this was a very rished piece, i think it turned out quite well
http://i46.tinypic.com/73p11y.png

The blending on the guys walking needs a little work. It is very rough, I would add a little feathering and blending to fix that.
Yea that is my main thing, they aren't blended particularly, more just pasted on.

why old men? and i agree just blend em in a tad more and you are good to go

Blending! Omg this would be really awesome man if you could just fix that:D

here's soem brief advice:

1) The water stock is taken from a really close up shot. And imo, you made no effort to make adjustments so that it looks a big vast
ocean, Yah i can notice that its a close up shot of a water. Or if it isnt a close up shot, then you did something to make it look close up
and imo its ruining the image, Make a change there, maybe some low water waves and a rock or two on top of the brim of the ocean will
look better.

2) The old men? I dont mind, infact the concept gets better insight with the oldies. I love it, Now as above posts submitted, then need
better blending, Here's what you can do, Use Dodge/Burn to make the light fall better on the oldies. Like Burn the front view since the light
source is behind, while dodge the edges of the men, it will look fantasy!
Add some bubbles coming out of the mouth so that they look like walking underwater. You know normal people need oxygen to survive
underwater :P

3) The Fishes are looking nice, but i would remove the ones from left side, they are blurry and lq, and imo spoiling the piece.
Those small ones are better fitting, Rather than filing up the piece with big fish, take some time and get some small fishes scurrying around
the oldies. It would look better.

4) I would say, un-blur some of the top of the brim water, its making the piece look lq.

Rest is absolutely fine, i love the concept. Just a little trimming here and there and it will be gorgeous. Keep it up buddy. :)

thanks. the water was a close up but my intention was to make the oldies look small. like an underwater world, but i got lazy at that stage. but thanks for comments