Upon being submerged when your head is about half way in the water in first person, you are able to see through the waters layer. See photo attached.
Steps to reproduce
Find an ocean or a lake that is at least 5 blocks deep.
Go into the water and use up/down arrows.
Just before completely going underwater you should be able to see or briefly see through the waters layer.
I attached a world save with the player at this current position.
When you open the world don't use the fly arrows, make sure you look up and down and you will see that there is no water layer.
Linked issues
Attachments
Comments 3
@unknown It took me a while to get it right on an android device but can be reproduced easier in Minecraft Windows 10 edition.
Cannot reproduce on Android (Samsung Galaxy S6 (SM-G920W8), Android 5.1.1 MCPE 0.15.3) probably because it's not possible to align your player so half of your view is in the water and half is out. May be worth checking to see if fancy graphics, beautiful skies or view bobbing settings have any affect on this bug.