[Taqwus]

All three Queens of Elemental Water share a basic component of their description (the heal-all-wounds-when-underwater bit) bit, but even underwater their regenerative properties are actually different.
I have two QoEW underwater in the same province, dom 10 + GoHealth + 55 base hp (each identical) => 110 hp.
Without any regenerative items, one lists 77 hp/turn and the other 99 hp (70%, 90%?). The third one regenerates 50% (on land, so that might matter).
Oh, and the QoEW with greater regeneration (90% underwater; Bath-something) is wrongly named once in the description, if memory serves.