Hmmmm....I see what you mean. It looked worse when I first overlaid the cloud layer onto the ocean layer, but I thought it helped a bit when I added that bit of non-cloud red coloring between the land and the ocean. I used a Gaussian Blur on a land mask black and white image, applied an expanded mask that was five pixels wider and then overlaid it onto the cloud texture.

What would you suggest doing differently for the ocean?