In Pokemon GO, Water types are among the best. With only two weaknesses (Electric and Grass), Water is among the best defensive types in the game.

Quagsire learns moves such as Muddy Water, Aqua Tail, and Earthquake instead of Megahorn and Sludge Wave. Quagsire also has slightly higher stats on average, except for special defense, where ...

The Pokemon does well with Tera Water as it has access to powerful Water-type moves. You can opt between Surf and Muddy Water to capitalize on the STAB effect granted by Tera Water.