I like the expression and the color gradient due to the skin color and sky reflection. I might try to tone down the mud/clay beneath him and it seems it needs a touch more sharpening for web.
Thanks for the comments, my sharpening is always hit or miss. I had not noticed the ssoil below I will look into doing someting with that.
It was taken from a vehicle I can only presume that the Hippo was on slightly elevated ground, a blessing when you can get it.
I don't think he looks silly either. To me he looks as if he is not happy you woke him. I agree about the bright mud. Great image in any case. One thing for sure is I wouldn't want to mes with him!!