Final answer:
Fish reproduce by spawning, releasing eggs and sperm into the water for external fertilization.
Step-by-step explanation:
The organisms that reproduce by spawning are fish. Spawning is a reproductive process in which fish release their eggs and sperm into the water, allowing fertilization to occur externally. This method is commonly observed in fish species such as salmon, trout, and cod. As eggs and sperm are released into the water, they mix and fertilization takes place, resulting in the development of new offspring.
Learn more about Reproduction in Fish