Italian crested newt
When newts are inactive or in oxygen-rich environments, respiration can be done through their skin which accounts for 74% of the cutaneous respiration. However, oxygen-poor environments, such as stagnant ponds, pose a threat to the survival of larval newts. This is because oxygen molecules do not readily dissolve in water, and as "T. carnifex" is an immobile animal, extracting oxygen from water is difficult. Newts consequently have external gills at birth that persist until metamorphosis, which assists survival in low-oxygen conditions.
Italian crested newt
"T. carnifex" are ectotherms. This means that the internal forces of this newt that control the body temperature have almost no importance. They are traditionally called “cold-blooded” although blood has really nothing to do with how these animals thermoregulate. This means that "T. carnifex" will regulate in a way that depends more on behavior. When there is a large range of environmental temperatures, newts are very insensitive to a thermal gradient profile.