Deathspider

The Deathspiders are an invasive species of giant insects in Bad Planet.

Physiology
The deathspiders they possesses various specialized forms. Some which resemble a cross between giant crabs and arachnids are specialized for attack. While others resemble oversize termites that lay eggs with winged carriers that spread out the eggs. Similar to ants they are eusocial, and reproduce by parthenogenesis, using dead prey to incubate eggs.

They are ravenous creatures capable of devouring all biomater on a planet within a few years. However they are susceptible to electricity.

History
Veronica Falcon of the Department of Planetary Defense surmises that the deathspiders may have been responsible for the loss of life on Mars due to the hematite concretions found on the desolate planet matching exactly like those the creatures produce.

Around 900 years ago the planet Phaedon faced an infestation of the deathspiders after a Phaedon pilot transported an mysterious cargo. The creatures were unable to devour the Phaedons but consumed the biosphere of life, leading the the Phaedon to infighting after they wiped out the invaders.

A pair of aliens delivered a load of cargo passing the Sol system, before it abruptly disengaged from the ship, destroying it on collusion before heading towards Earth. Two UFOs containing a myraid of lifeforms crashlanded on Earth one in Washington D.C. and another in Bloedriver, Africa.

Later investigation revealed that the containers carrying the deathspiders was an ark of some sort, which later transmitted a message to space contacting the 'proper authorities'.

The Last Phaedon believed that someone was manipulating the deliveries of these creatures to viable planets but for what purpose he could not fathom.

The deathspider infestation was halted to the efforts of the Last Phaedon who created a giant Tesla Coil that engulfed the planet, electrocuting the creatures.

Source

 * Bad Planet