I like the idea and scene, i love how vast and flat the ocean floor looks, quite fantastical. The blade he's holding is horridly placed, especially against his oddly angled frame. It's plainly verticle, and highly contrasted, things that make the eye draw directly to it. Bad bad. The figure itself is leaning too far forward imo, even though he's underwater it would seem he's able to stand on the seabed and therefore it has some sort of similar psychics to above the water. Although i dunno much about that really, i guess he could be wearing iron boots and all. But the fact is he looks very unbalanced and awkward. His largest leg looks especially odd, shape-wise. Alllllso his helmet is really jaggedy, but i'm sure you realise that.
I really like the contrast between the red and the dull teal colour.
I suggest you take out the speech bubble. It's hard to read and just removes much of the interest of the pic for me, makes it seem to have less of an overall point, as if it's just a cheap 'joke'.
Anyway keep workin on it.
