External, like most fish.
Externally.
internally
internally
Dolphins reproduce internally and give live birth.
The stickleback male makes a nest from kidney secretions. The female will lay the eggs in the nest. The male then fertilizes the eggs and guards them until they hatch.
All foxes are mammals and reproduce internally.
internal
Aye ayes reproduce internally like any other lemur.
The term "external reproduction" for higher animals means in eggs rather than internally. So the hawk reproduces externally, laying and hatching its eggs.
internal
Country which is independent both internally and externally
internally