The indicator for hypo are 20 clear nails with no black in them. For trans it's the black eyes. Cute little dragon!
The marks are called stress marks, since they often show up when the dragon is displaying it's "unhappy" colors. They are common on babies. They can be for many reasons, and learning your dragons colors will help decider it's moods and what, if anything is wrong. Dark usually means they don't like something, or they are trying to soak up more heat/
UVB light. Sometimes it means your husbandry needs to be checked, or that they are not feeling well. Sometimes it means they need to take a poop, or someone like that. Rule out stress (living with other dragons can be stressful) and husbandry, and you are likely fine.