Abyss Dragons are a variant of Amphibious Draconians with a variety of alterations, mostly fairly minor in themselves, but which add up to quite a different-behaving Norn. As their name suggests, I particularly like them in the Deep Abyss metaroom. They look incredible there - almost subtly bioluminescent sometimes against the dark background. However, they will work fine in just about any metaroom so long as you provide an adequate supply of edible critters, pests, and bugs, since they are fully amphibious.
A list of the various ways the Abyss Dragons have been changed is included in a .text document in the .zip file (sorry the picture is so dark, but I had a hard time getting a good image showing both a male and a female. The more truly blue one with a greenish tint is male, the one that looks sort of brown or gold as well as blue is the female; the color differences are due to the underlying sprites of the Draconian Norns).
IMPORTANT! This breed requires the Draconian Norns to be installed to look right!
Congrats Lurhstaap, they look great !