Crease Down Back- Normal?

[irthumper]

Intro: Hi, my guy "Skinky" is a Classic Indo. He is going to be 3-years-old (appx) this June. We took him in Dec of 2019 from a guy who claims Skinky was cbb and that he had both parents. He also claimed Skinky was a proven breeder female... sperm plugs proved that to be a big nope! He apparently co-habbed 2 skinks together and one day there were babies in the enclosure. He swore he thought ours was the female. Um, yeah, right... Anyway, Skinky was stressed and a bit what I thought on the thin side when we got him. He was also in the middle of the "Seasonal Sleepies" (what I call an Indos answer to brumation) but he was healthy with no issues other than a missing toe and 2 other missing claws on one hind foot. Right now he is eating one main meal a week, along with a smaller snack a couple times a week. I make his food from a variety of different items found in the food chart and change it up each time; his food is dusted with Reptocal (w/ cal+D3) or a complete vitamin powder. He has a tropical T8 UVB light, but the tube is due to be changed since it is a year old (I don't have a solarmeter). He acts normal, sheds have been good, no indication of RI, parasites, or anything else, and when I see poops they appear normal. He moves around normally, including climbing on top of his extra large upside down dishpan humid hide. Parameters are normal, though humidity is impossible to keep up, so the large humid hide really helps. He is going to be upgraded from his semi-bio (CUC/springtails & isopods but no plants) 40 gallon breeder to a 24x48x15T fully bioactive AP enclosure this spring. Basking lamp is a 40W halogen in a dimmer dome; temp can go up to 121F in the basking spot. Warm side is around 91, cool side is mid-80's. He also has a 6500K LED strip light, as I was planning on a planted tank. At night all the lights and heat goes off (lighting is 12 hours on/12 hours off); the room he is in is generally 77 to 79F during the day and 72 to 75F at night. Room humidity averages 45-50%. The humidity in Skinky's tank won't stay up (not using a fogger at the moment) but it is 65+ to 70% inside his large humid hide. Substrate is a layered mixture of cypress mulch/Eco-Earth/Reptichip covered with leaf litter, and the hide is stuffed with damp NZ sphagnum moss. He has cork flats, a fake half log hide, and lots of fake plants on the floor. His food dish is a large Exo-Terra brand.

Issue: So here we are, a year and 3 months into our journey with our BTS boy. He is shedding normally, just came out of his second seasonal slow down phase with us, his appetite is ramping up, and I noticed he has a crease down the middle of his back. He doesn't look like he's over weight to me, but he's my first BTS, so not sure if this crease is normal or what. Anyone have any ideas? Thanks!

[splashy07]

normal

[rixusaku]

Please share your fully bioactive enclosure when it's finished! I would really love to see it :D

[Noodlebasket]

I agree with the others, this is just a healthy, chonky skink! You are killin it!

[Janella]

He looks good. Nothing to worry about