Orcas are a type of dolphin seen in the second and third books. They first served as silander's minions until the Battle of Silander's end. They call this their shame as many innocent blood was shed. In the battle of riptide, Tiktun and his battle pod came to Gray's aid and helped chase Finivus off to his home waters. They despise the name killer whales as it reminds them of their shame