from the author The bluish light's heat attracts the creature's prey - fish which hunt by using infrared vision. When the fish gets close enough, the powerful muscles in the creature's hand close the fingers - breaking through the layer of ice and trapping the fish inside the hand like a cage. It then uses its taloned feet to kill the fish by spearing it.
Me: Although the creature appears whiteish in colour during the day, I wanted to draw him at night so you can see the body heat adaptation. I also figured that the creature can recede the glow when it needs to be hidden, and concentrate it to increase brightness in luring/confusing prey situations
it looks like it has skin like a mirror. in a surrounding were most everything is simply white that would be very effective. especially scenes snow is very reflective anyway.