Water-breather

Water-breather was a term used by Leonard McCoy referring to anyone who used gills to breathe underwater, such as James T. Kirk and Spock after surgo-op, or the Aquans who performed said feat.
McCoy stated that this mutation was caused by an unidentified substance or hormone found in the bloodstream that affected their entire metabolism. ()
== See also ==
* Air-breather
* Mermaid
* Xindi-Aquatics
Category:Slang
Category:Lifeform classifications