Originally Posted by Loobylou
From looking at my babies, I imagine the red dots inside the head are blood vessels. If as you say his other veins are more prominant than usual, that might why they are easier to see. With sudden deaths, especially in littleuns it's usually attributed to genetic abnormalities, (at least that's what I've been told).
If you think it may be something sinister post a picture for one of the experts to look at, especially if you think it's something like an infection that can harm your other axolotls. Stuff peoples sensibilities, they don't have to look!
You could always add a warning to the thread title, saying there are photos. Then it's up to the individuals to choose whether to see the photos or not + no-one will get any nasty surprises