> Some people think they fell from the sky. Ctenophores are a nigthmare to study. They self-disintegrate at the slightest touch and aren't well adapted to low

> Some people think they fell from the sky. Ctenophores are a nigthmare to study. They self-disintegrate at the slightest touch and aren't well adapted to low pressure environments. Pieces of an animal being dragged from a storm before to fall again does not count as a realistic way to spread. If you mean that they could have an extraterrestrial origin, is really unprobable IMHO. If there is an animal badly adapted to survive in the space is this.