Definitions for harp seal
Random House Webster's College Dictionary
a N Atlantic earless seal
Origin of harp seal:
1775–85; so called from the harp-shaped markings on their backs
harp seal, Pagophilus groenlandicus(noun)
common Arctic seal; the young are all white
A species (Phoca groenlandica) of true seal (or earless seal) found in the northernmost Atlantic Ocean and adjacent parts of the Arctic Ocean.