When goldfish breed, the male fish chase the females who dash around amongst the plants at the surface of the water. As they do this, the females release their adhesive unfertilized ova (Eggs) and these stick to the plants. The following male goldfish then release their milt (sperm) which is sprayed over and amongst the females ova. This results in the males "milt" comming into contact with the females "ova" resulting in the "external fertilization" of the ova.
External in bony fishes and internal in cartilaginous fishes .
amalyer
externally
Cats fertilise internally.
internally
No - they fertilise internally.
Koalas do not fertilize their young. They fertilize each other (internally) to produce young.
No, the platypus does not fertilise its eggs externally.
Kangaroos fertilise internally. However, development of the tiny joey primarily occurs externally, as it undergoes most of its development in the mother's abdominal pouch.
All reptiles fertilize internally
All insects do this.
Country which is independent both internally and externally
Externally.
internally
internally