Some slimes can avoid this weakness by turning their bodies into a gel-like form that keeps them from getting diluted. It is implied that exposure to large bodies like lakes or rivers could be fatal or at the very least be dangerous to the slime. But falling into a body of water will dilute the slime, which greatly weakens it. They also become somewhat more intelligent over time as they gain experience.
When a slime is low on food it will seek out the closest source of easily-absorbed liquefied protein and attempt to consume it (this includes body secretions).
While capable of absorbing almost anything, slimes need at least water and some protein to survive.Slimes are able to speak and understand human languages.