That looks good. It needs some contrast with the background and the border for my taste needs to be less think. More of the purple thats close to its fin should be added to diverse the colors too. Looks good though. Nice job.
That looks really cool, especially with the border. Something about the whale looks off though, but that's probably just me. Good job.
I like the blue smeared across the back like water (atleast it looks like water to me), and obviously, you like the ocean in general, partly from the sig and from your name =P
Could you post the original stock image or render or whatever you used, that helps sometimes so that we can see what you actually did. To me it seems like you screwed around with some filters and the coloring. And sometimes that's all you need to do, but I'd just like to know how it started.