Here is the full list of all 12 ABZÛ achievements worth 1,000 gamerscore. It takes around 1-2 hours to unlock all of the achievements on Xbox One.
Leap from the water.
Perform a flip while riding a creature.
Burst 15 fish schools in the jetstream.
Witness predation while meditating.
Discover those that lurk in the abyss.
Ride the Great White Shark.
Breach the water on the back of a blue whale.
Discover the polar region.
Release fish from all the hidden pools.
Find all the meditation statues.
Complete the adventure.
Add all secret shells to your collection.