Help!! if you know a short story entitled The Sea Devil by Ray Bradbury tell me where to find it!!! Thanks

Unless it's a retitling of something such as "The Fog Horn," there's one called "Undersea Guardians" which is so rare even I haven't read it. Otherwise can't help you.

There is a story called "The Sea Devil," but it's by Arthur Gordon.

Yes, Arthur Gordon story sounds like the answer. Man fishing at night on a dock in the Tampa Bay catches more than he can handle. His struggle with a netted giant manta ray draws him out to the open gulf. Great man vs. animal. Good intensity and somewhat of an RB tone, however....