Apparently we get a sea battle involving Euron vs Theon, Yara and Dornish, which he wins and ends up taking Yara captive, and kills some if not all of the SS including Ellaria.
There is also apparently a battle between Dany and Lannister/Tarly forces, which she wins. Jaime and Bronn are there, but manage to escape. Whether this is naval or not is not known.
Una!

Of course. He's gunna tear her up.