Oacha'noa is a kraken-like sea-goddess worshipped by the tuskarr that can be summoned using the Pearl of the Depths at the Briny Pinnacle in the Dragonblight. She is involved in the quest  Conversing With the Depths.
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When first called forth by adventurers, Oacha'noa asks them if they are working with "the trolls of this land", likely indicating the Drakkari ice trolls, and wonders if they are there to kill her and take her power, likely referring to the fact that the Drakkari betrayed and killed their loa gods to use their powers against the Scourge. This likely means that Oacha'noa is herself a loa, and thus a Wild God.
- She may not be a an actual loa, however, she's most likely a powerful spirit, which are known to be referred to as "loa" by trolls.