I'm not sure that this would emote Zen for me, but overall a peaceful setting for this creature, far from the maddening crowd. I like the boldness of color on him, and that tongues color is captivating.
Good focus on the tiger but not "zen" to me. A tighter crop would work better, to get rid of the foreground rock and the light spot in the background - both tend to pull the eye away from the subject.
while it's a nice clear shot of a tiger...the zoo elements in the shot like the door and fake rock spoil it...it really is nothing more than a zoo shot and I am not sure how it fits the challenge...sorry