sweet-metazoa:

Skeletorus is a pretty unusual name.  You might think that a creature with that
nickname would be a huge monstrous thing, ready to devour humans at the
slightest provocation.  I hate to
disappoint you, but despite the spooky name, Maratus sceletus is no monster, unless you happen to be an
arachnaphobe, because Skeletorus is a little bitty spider

A peacock spider, to be precise, Skeletorus was recently
discovered in Australia, along with Maratus
jactatus (aka Sparklemuffin), and is the only known peacock spider to be
strictly black and white.  Peacock spiders
get their name from the colorful abdomens of the males.  These spiders come in a variety of colors and
patterns, but none of them get any bigger than a pencil eraser.

Even if a spider that size scares you, there is nothing to
worry about.  Despite being endemic to
Australia, a country known for its deadly animals, peacock spiders fangs aren’t
big enough to pierce human skin, preferring to hunt crickets and other small
insects.

The males of the peacock spider family use their brightly colored
abdomens to court the females, and will wave it, along with their legs, back
and forth in an effort to impress her, so that they can mate.  If the female does not like what she sees,
she’ll simply eat the male and find someone else.