Fiberglass or gunite - high water table area coastal property on a canal Galveston Texas

We are building a coastal house on a canal around the Galveston texas area. The pool will be several feet from the bulk head. I have been told soil shifts more in this area and I know we have higher water table as most pools need to be built up out of the ground a few feet to handle high water table as well as high tides, storm flooding etc.

Gunite pools are far more popular in Texas than fiberglass. I have a gunite at my home but was considering fiberglass as this is a vacation home...

Fiberglass or gunite - high water table area coastal property on a canal Galveston Texas