Hearthpwn

Okay, okay, I'm a bit late after the deck "Shaman and Friends" but hear me out. There are some cards in this deck that have surprising synergy with Murlocs.

First on the list of cards one would not immediately thinks goes in a murloc deck is Earth Shock. Earth Shock is not necessarily a "Murloc card", but it is a cheap silence, and one damage often makes a difference when trying to take something down. I mainly put it in there because it's 2 mana cheaper than Hex, and the main thing you want to be targeting with this (since this is an aggro deck) is Taunt minions, which is easiest dealt with through silence. Go ahead, if you feel it works better, and add an Ironbeak Owl or Hex.

Wait, what is this, Whirling Zap-o-matic isn't a Murloc, what is this deception? I consider Windfury to be an aggro mechanic, and thus fitting well into an aggro deck. You stick a Rockbiter Weapon  on that, you get 12 damage! If you want to swap it out, which is not always suggested, you stick a copy of Reincarnate in (see below) and for the second copy Murloc Tidehunter because of the Tidecaller synergy.

Ancestral Spirit is surprisingly synergistic with Murlocs. Firstly, Siltfin Spiritwalker draws you a card without losing a Murloc, Murloc Tidecaller gets bonus attack from resummoned minions, and a main bonus with Murlocs is that if you can put this on your very necessary Murloc Warleader very persistent. It would make a bit of sense to sub in a reincarnate to obtain synergy with this.

Feral Spirit is AMAZING and helps protect you where Murlocs aren't very defensive. Great bonus to Bloodlust as well.

Lightning Storm is a decent clear, keeping your board advantage. At worst, being a little better than Consecration, and noticeably better than Hellfire.

About Unbound Elemental. About one fifth of your deck has Overload, because all the new Shaman Murloc cards do. I don't suggest subbing this out.

Enhance-o Mechano is really good in this deck, because often you have a big board presence, with a lot of minions to target. You give your Coldlight Seer taunt, Old Murk-Eye Windfury, your Warleader Divine shield, or Neptulon any of these. If you had to sub this out I would probably say a minion with taunt like Arcane Nullifier X-21, or maybe a windfury card like Windfury, Dunemaul Shaman, or Windspeaker. Probably the Shaman, but the Windfury gives you more Aggro power, and Speaker gives you an extra body for Bloodlust to target.

Side notes:

Puddlestomper, 3/2 for 2, most efficient Murloc.

Coldlight Seer has Battlecry: increase the statistical value of Murlocs by 1 mana, making them enormously better. It's crazy.

Neptulon: Many professional and legend Hearthsyone players say this card is good, even outside a Murloc deck, so it should be AMAZING here. Plus, it is the only card that fits in anything vaguely resembling a late game.

Have a nice day.