From the pictures, it looks like it could be a very early start to a fungus. Although its hard to tell with an albino and those pictures with it being that tiny!
My suggestion would be to first see if you can very gently remove whatever this "white stuff" is with a Q-tip. Keeping him/her in cool clean water and see what comes of it.
Fungus can be deadly is not caught fast enough and treated. Right now, from the pictures it looks very tiny - so whatever it is, whether it be fungus or not - you're catching it in time.