Syngamy can occur outside the body of the organism in
As we discussed in concept
External fertilisation -
In most aquatic organisms, syngamy occurs in the external medium (water), i.e., outside the body of the organism. This type of gametic fusion is called external fertilisation.
Organisms exhibiting external fertilisation show great synchrony between the sexes and release a large number of gametes into the surrounding medium (water) in order to enhance the chances of syngamy. e.g., majority of algae and fishes as well as amphibians.