Final answer:
Most fish reproduce by external fertilization, where the female fish lays eggs and the male fertilizes them externally.
Step-by-step explanation:
Most fish reproduce by external fertilization. This is when the female fish lays her eggs and the male fish fertilizes them by releasing sperm directly onto the eggs in the water. The eggs are then left to develop on their own. There are some fish species that practice internal fertilization, but it is less common than external fertilization.
Learn more about Fish reproduction