This is the Primalfin Lookout HS Shaman Card from the Journey to Un’Goro expansion due for release in April.
It’s a Neutral minion and the card reads: Battlecry: If you control another Murloc, Discover a Murloc.
You can get Primalfin Lookout by opening packs from the Journey to Un’Goro set.
*More Murlocs are coming with Un’Goro 🙂