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.
Kaiser's spotted newt
Feeding is simple, as these newts are very hardy animals in captivity, and love to eat. Good feeders include Earthworms/Canadian night-crawlers, live and thawed Blackworms, live and thawed Blood-worms, calcium dusted Pinhead crickets, the occasional Waxworm, and various other insects. Insects collected outside should be avoided as they might introduce pesticides or parasites.