Nope. Clear, black, white, blue and tan i think. The only pond store I found that had it only had black and clear. So I went with black for that reason. I thought clear would be pretty but that the wood grain would be distracting.
anyway, I was talking to my brother who is an engineer, he basically told me that glass and plywood are very similar in the amount of weight or tension they are able to hold/withstand, but plywood has a lot more ductility or elasicity which allows it to bow out under pressure.
a sheet fastened on all 4 edges is a lot less likely to bow out far enough to cause issues at seems, however he recommends a brace on the bottom and back to minimize this bowing effect over [time]