"swirling-surf" is simply a more accurate and detailed description of surf that occurs in the ocean. "Swirling" implies that the surf is especially large and rough. 
        
                    
             
        
        
        
A Compound sentence it has 2 independent clauses that has related ideas that can be joined by a coordinating conjuction.
        
             
        
        
        
I like a short copy of an album or somtimes can be a clip of what is coming on a album