Wow, that is really fascinating information! It is wonderful that your father was able to show you such an interesting phenomena! Now knowing how they are read, I need not fear using an incorrect pencil since all I need to do is ensure that the mark is sufficiently dark. Thank goodness for my paranoia during the exam, for while marking the sheet the mechanical pencil I used was rather hard, so I spent a notable amount of time carefully going over each bubble so as to make them very dark. (In hindsight, this is information I could have researched years ago, but it is so much more fun to learn from another person!)



Thank you! This is certainly a bizarre creature, fit for much more alien planets than our own. While not particularly dangerous by itself, you would certainly be wise to stay out of its way- that underbelly structure is home to a colony of polyp organisms that have replaced the nep's organs as part of a symbiotic relationship. Their tendency to release toxic vapors into the air is rather troublesome, to say the least. Makes for good pesticide though.