She was one of the mutants who survived Mr. Clean's massacre of the mutants living in the London sewers. She has many animalistic attributes and the nautical prowess of a beaver.
Carla was created by Joe Casey and Ian Churchill in 2001 and first appeared in Uncanny X-Men 395.
Carla was one of the London based Morlocks, a community of mutants who lived in the sewers. The community was being hunted down by Mr. Clean, an agent of the Church of Humanity, who was genetically engineered to murder mutants.
Carla has taken on the appearance and attributes of a giant anthropomorphic beaver.