The term SEA RAPTOR can be broken down into two crossword solutions: ERN (3 letters) and ERNE (4 letters). ERN is a type of seabird, also known as a cormorant, which is found in both the Northern and Southern Hemispheres. ERNE is a species of seabird, also known as the Lesser Crested Tern, which is found in tropical and subtropical regions. Both of these birds are part of the same family, Laridae, and are known for their ability to dive underwater to catch fish.