(at around 4 mins) Abby says that she needs to perform an "autopsy" on the creature to determine more about it. (Something she has also done in other episodes) An "autopsy" is a postmortem on a human. On non-humans it is called a "necropsy". This is something that Abby would know having training and experience in non-human animal science. If someone such as Abby were concerned that individuals would not understand what a "necropsy" is, they would use the more generic term "postmortem".