The term SEA RAPTORS can be broken down into two crossword solutions: ERNS (4 letters) and SEA RAPTORS (10 letters). ERNS stands for the scientific name of a group of seabirds known as the erns, which includes species such as the white-tailed eagle, the black-winged kite, and the booted eagle. SEA RAPTORS is a collective term used to refer to any bird of prey that lives in or near the sea, such as ospreys, eagles, and hawks.