Ixvapyan
The Ixvapyans appear to be a race of aliens whose tissues are capable of eluding most conventional sensor technologies. There are unconfirmed reports that they can move through walls, or perhaps appear unexpectedly.
Little is known about the race, aside from the fact that their skin is richly embellished, possibly with tattoos. They are tall, bald and black skinned. The security sensors on DS-17 recorded an image of an Ixvapian, however only a tattoo on his forehead was visible. The image has been attached to this record as it is believed that it may help in explaining certain archaeological mysteries in the future.
The glyphs of the Ixvapyan tattoos are reminiscent of certain as-yet undeciphered writing systems from Earth's and other civilization's past.