TASK DEFINITION: In this task, we ask you to elaborate the sentence without changing its general meaning. You can do so by explaining further the input sentence, using more precise wording, adding qualifiers and auxiliary information etc.
PROBLEM: One species , the northern fur seal ( " Callorhinus ursinus " ) inhabits the North Pacific , while eight species in the " Arctocephalus " genus are found primarily in the Southern hemisphere .

SOLUTION: Eight species belong to the genus " Arctocephalus " and are found primarily in the Southern Hemisphere , while a ninth species also sometimes called fur seal , the northern fur seal ( " Callorhinus ursinus " ) , belongs to a different genus and inhabits the North Pacific .

PROBLEM: Fish lice are the family Argulidae , or ' carp lice ' .

SOLUTION: The family Argulidae contains the carp lice or fish lice a group of parasitic crustaceans of uncertain position within the Maxillopoda .

PROBLEM: Apostasy is punished by death unless the apostate agreed to return to Islam .

SOLUTION:
According to the classical doctrine , apostasy from Islam is a crime as well as a sin , punishable with the death penalty , typically after a waiting period to allow the apostate time to repent and to return to Islam .