Hi there and welcome! The tail looks to be a part of his translucent coloring, but it does have a suspicious partial kink. Definitely is something to keep close watch of.
Now, I’d like to offer some assistance that you haven’t asked for.

Many have started with the chameleon kit. Unfortunately, you’ll be needing to make many upgrades including eventually getting a much larger enclosure. The most important thing right now is to get the correct uvb, which is a linear T5 with either a ReptiSun 5.0 or Arcadia 6%. The screw in uvb bulbs aren’t able to provide adequate uvb levels any farther than about 2-3” down. You’ll want to elevate the linear uvb about 4-5 inches above the top of the enclosure and then have your basking area about 4” from the screen top. This total distance of 8-9” will give the ideal uvb level of 3.0.
Next important is supplements. This is one thing that Zoo Med did right. The plain calcium that the kit comes with, you’ll want to dust lightly every feeding. The Reptivite with D3 that comes with the kit is to be used one feeding every other week. I’ll attach the feeder and gutloading graphics for you. It’s important to keep your feeders well fed and healthy so that they are more nutritious for your cham. Rather than go on and risk overwhelming you, I want you to check out
https://chameleonacademy.com/chameleon-basics/ On YouTube is Neptune the chameleon. After you’ve checked those out, come on back here and we’d love to help you with whatever we can to ensure you enjoy your chameleon for many happy and healthy years.
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