Fiction:The Calaroid Swarm

The Calaroid swarm happens once every year, from the eleventh of May to the fifteenth of August. Trillions of Calaroids make up the swarm, and they can breathe in the vacuum of space, making them very dangerous. The swarm begins on a tiny rocky planet orbiting a brown dwarf star called Alestron Inesel. People have tried many times to simply destroy the world they hatch on, but this has no effect. They simply move to a new one.

Swarm 2008
The swarm in 2008 was mostly aimed at the Light Sector.