During external fertilization, many gametes are released into the water by each sex at the same time and place.
This type of fertilization requires water because animal sperm must swim to the eggs. Water also protects the gametes from drying out.
Species which have external fertilization are either aquatic or return to water for reproduction.
Fish and amphibians are two groups of animals that typically fertilize externally. They release their eggs and sperm into the water to fertilize externally rather than internally.
internally
internal
Amphibians fertilize their eggs externally.
externally
It gives them a better chance or increases the odds of having atleast one egg fertillized.
true
Externally fertilize eggs.
Internal fertilization
That depends on the species you are asking about, mammals fertilize internally and fish externally.
No. Fishes fertilize externally.
Koalas do not fertilize their young. They fertilize each other (internally) to produce young.