Wraith Starships
In Stargate Atlantis, the Wraith are the dominant race in the Pegasus galaxy, with a large fleet based around enormous hive ships. Their ships lack shields and are generally less powerful than the ships of their defeated enemies, the Ancients. Wraith ships have a hybrid organic nature; they are grown, not built, and may have some degree of self-awareness. They begin with a pathogen that infects a human, and uses energy to convert both organic and non-organic matter nearby into a biopolymer similar to a polysaccharide, but with organometallic compounds mixed in. The polymer is initially soft and malleable but eventually hardens into a dense substance that is resistant to heat, pressure, and radiation. The growing process can be stopped if the human nucleus is freed from the pathogen.
Read more about this topic: List Of Starships In Stargate