Editing Space Sharks (section)

===TL;DR===
'''The first mention of the Carcharodons says that their gene-seed might be Raven Guard''', but doesn't expand on that. Given that this was during the time that the [[Blood Ravens]] were really in the popular vogue (as they still are to this very day), the idea that the Carcharodons are secretly [[Traitor Legion Loyalists]] was pretty popular because their tactics are more like the Night Lords than anyone else's. GW has tried to walk it back a bit by saying the Raven Guard were basically the Night Lords only with Corax instead of Curze since then, but the debate still rages on because most of the documents supporting the Raven Guard hypothesis are speculative in-universe, and the Imperium would probably cover up a loyal Chapter being descended from Traitors if the Blood Ravens are anything to go by.

Horus Heresy III: Extermination suggests they're the descendants of Terran-born Raven Guard exiles led by Shade Lord Arkhas Fal, the grey armoured and white-faced pre-Corax XIXth Legion who had a reputation for going from stillness to extreme brutality and were basically taken under Horus Lupercal's wing in the centuries before their own Primarch was discovered. The exiles are referred to as a "nomad predation fleet" the same as the Carcharodons in the Badab War books and their cognomen during the early Great Crusade era was "Pale Nomads", a title given to them by the Luna Wolves and also the title of Te Kahurangi, the Chapter's current chief librarian, rumored to be only three generations removed from the original exiles. The Reaper Prime (Captain) of the Third Battle Company wears armour bearing the skull and lightning bolts of the Terran Pacification War further highlighting the Chapter's links to the pre-Crusade Legions, and Tyberos' distinctive shark-like helmet is also featured in the book.  In addition, in Robbie MacNiven's Black Library novels ''Red Tithe'' and ''Outer Dark'' (<s>the only books we have dedicated to our jawesome friends</s> not anymore) it heavily implies that the Space Sharks are a chimeric combination of Raven Guard and Night Lord gene-seed, possibly with some World Eater mixed in, so the debate rages on.
<div class="mw-collapsible-content">