I was finally able to take some photos and video with my Nikon 1 J3 and the Nikon WP-N2 underwater case. I was amazed that it was able to focus so quickly because when one is underwater, it is quite hard to be able to stay motionless or have the subject stay motionless due to currents and buoyancy control. The only lighting used was the sun and a small handheld underwater LED flashlight.
Anyway, I posted a set of images and video at Nikon Image Space. The URL is at http://img.gg/mHyqNf6
if anyone is interested. Make sure you wait for the complete image to download because they are using a heavily compressed thumbnail as a teaser.
No coral, fish,or invertebrates were harmed when taking these pictures/videos. The photos were saved as JPG and imported into Aperture in order to embed additional EXIF and GPS data. A small number of images had the white balance changed.