The term SEASIDE RAPTOR can be broken down into two crossword solutions, ERN (3 letters) and ERNE (4 letters). ERN is a type of bird, also known as a sea eagle or white-tailed eagle, which is found near coastal areas. ERNE is another type of bird, also known as a fish eagle, which is found near lakes and rivers. Both birds are large raptors with impressive wingspans and are known for their powerful hunting abilities.