Life on Pluto
You will be surprised when you learn this...
First we need to know the elements that are able to support this "Life"
What I mean is, water is not the only one. The reason that scientists look for water is because they want to start with the things that we know already. This life would probably be the most Earth like of any other solvent. The other's are ammonia the cleaning chemical, liquid hydrocarbons, or hydrogen cyanide. Also, these lifeforms would need to breath in a stable atmosphere and possibly a magnetic field. This air would not be like Earth's. Their may not need to be an atmosphere depending on how cold the planet is or how far away. If they were unlucky to have their planet so far away from their star then they may not want an atmosphere to get the most powerful of the star's rays.
The Planet has water and ammonia
People may forget that Pluto is 1/3 water ice. This ice has traces of ammonia on it. The ammonia and the water are both solvents that may be able to contain life. This ammonia is very rare on Pluto with it only being 5% of the minerals located on the planetary body. It would be likely that the life on Pluto would be under the surface in an ocean. This is where most water would be held. The ammonia is still scattered throughout the water and life that would live in these puddles would need to be microbial.
Pluto itself...
This is a nice picture of Pluto took by the New Horizons spacecraft that did a flyby of Pluto. It discovered some pretty amazing things on Pluto.
Oceans and oceans
The ocean on Pluto would be contained of a lot of water or methane. It would either way be able sustain life. The ammonia would help a lot in a methane ocean.
Life
Life on Pluto may just be microbial but it could evolve to one day be large aquatic creatures. It may already have done so but, if we want to know then we should bring a microscope along.
The ocean of Pluto
The ocean of Pluto lays underneath the surface of the rocky ice ball. It is melted by underwater volcanoes and is maintained by the heat of the core. If Pluto loses it's volcanoes, the life will die. The ocean is made up of water or methane. Of course the ammonia would play a role in a methane ocean but, it may not be important in a water ocean. The ammonia may play a big role in a water ocean to some species but, the most animals would probably drink the water instead.
The life of Pluto
The life on Pluto would, of course, look very different from Earth's. This life could be in the form of simple viruses to complex underwater intelligent beings. It is most likely somewhere in the middle with something like viruses and animal life but, we are not sure and won't be until we go look. The life would most likely be microbial and we could probably never be able to comunicate with it. It is hard to really imagine what life on Pluto would look like. It is like trying to imagine a new color that you have never seen before, it's impossible.
Back round information on Pluto...
The planet is one of the farthest away from the Sun and is one of the coldest. Pluto is considered a dwarf planet by most scientists and is the 9th biggest now that we know that it is bigger than Eris. It has five moons which are name Charon, Nix, Hydra, Kerberos, and Styx. I named them from biggest to smallest. Pluto also has a red tint to it that is made by hydrocarbons. These are not liquid hydrocarbons but these could most likely hold small lifeforms like bacteria that would attach themselves to it.