English edit

 
Mature saddleback seal

Etymology edit

saddle +‎ back +‎ seal. From having a harp-like-shaped part of its back outlined in black, that looks like a location to place a saddle.

Noun edit

saddleback seal (plural saddleback seals)

  1. Synonym of harp seal (Pagophilus groenlandicus, a marine mammal)