+free half tech (can colonize level 1 extreme worlds but, only aquatic and get at least half production). +full tech, can get full production on aquatic worlds
the +1 tile per tech age to me is weak as I think this would be better if it was +1 per aquatic planet per tech age.
The only thing I dislike about it is adaptable can colonize both aquatic and frozen worlds right away therefore when planets are rare at the beginning of the game I prefer adaptable.