Guppies are fertilised internally they are livebearers.
Amphibians fertilize their eggs externally.
Most fish eggs develop outside of the body. There are however around 3% of all fish which fertilize internally.
Internally
yes the eggs are fertilized internally
Most fish do not get pregnant in the sense of that of mammals, like humans. They produce eggs externally and then the males fertilize the eggs. Some types, such as sharks, do get fertilized internally.
both
Externally fertilize eggs.
tortoises lay eggs
The term "external reproduction" for higher animals means in eggs rather than internally. So the hawk reproduces externally, laying and hatching its eggs.
Crustaceans use external fertilization rather than internal fertilization like most animals. The eggs are fertilized and then typically carried on the females body.
Fertilization occurs internally. The fertilized eggs are then released and mature externally.
the answer to this question is internally for most newts, including all Western types.