Its been waaayyyy too long since I posted a Photo of the Day, but will intend to get that going regularly again.
These two Chromodoris kuniei were spotted on a dive in 2006 in PNG’s Milne Bay area.
The nudibranch on the right is facing us, while the one on the left is facing away. This “69” position is how nudibranchs typically mate.
C. kuniei is one of the more vividly coloured nudibranchs, with the beautiful purples of the mantle edge and spots contrasting the golden brown.