Melanistic Savannah Monitor

Recently received this Savannah that appears to be very dark. Almost looks melanistic very feint pattern. I put another Savannah next to it for comparison. Anyone seen anything like this? More a snake person

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It is dark, however varanids will significantly darken in coloration when underheated. What is the basking surface temperature reading?
And where’s the dirt?

What you are seeing is likely the difference between captive bred and wild caught savs. The offspring I kept from my breeding look just like the lighter one while the parents were the darker shade.