Red Photos

Beginner underwater photographer here. I am on a week's diving trip in the Maldives and we have just finished our first day.

I took a load of photos with a Canon g7x mark ii using a fantasea housing + a red filter. I shot with auto white balance settings & no strobe or any other kind of flash. Most of these were shot between 12-25m of depth in very good visibility.

As you can see these have come out ridiculously red. What am I missing here? Do I ditch the red filter? Is the underwater white balance setting on the canon any good?