Here is a list I pulled from the Yugioh wiki. I added a few more cards to the extra deck just because I have them.
Monsters
Mermail Abyssocea x3
Mermail Abyssleed
Mermail Abyssdine
Mermail Abyssmegalo x2
Mermail Abysspike x2
Mermail Abysshilde x3
Mermail Abyssturge
Atlantean Dragoons x2
Atlantean Heavy Infantry
Atlantean Marksman x2
Atlantean Attack Squad
Deep Sea Diva x2
Extra Deck
Synchro Monsters
Black Rose Dragon
Ally of Justice Catastor
Gungnir, Dragon of the Ice Barrier
Xyz Monsters
Mermail Abysstrite
Mermail Abyssgaios
Snowdust Giant
Gagagigo the Risen
Wind-Up Zenmaines
Spells
Abyss-scale of the Mizuchi
Salvage x2
Moray of Greed
Mystical Space Typhoon
Monster Reborn
Heavy Storm
Dark Hole
Pot of Duality
Traps
Abyss-scorn
Abyss-sphere x3
Torrential Tribute x2
Mirror Force
Bottomless Trap Hole
Dust Tornado
Solemn Judgment
Here are the archetype-specific cards.