Final answer:
Perch lay a large number of eggs to increase their chances of reproductive success and ensure the survival of their species.
Step-by-step explanation:
Perch lay between 10,000 to 40,000 eggs at one time, which is advantageous for fish because it increases their chances of reproductive success. Fish lay a large number of eggs because they have a high mortality rate due to predation, disease, and environmental conditions. By producing a large number of eggs, fish increase the probability that at least some of them will survive and reproduce, ensuring the continuation of their species.
Learn more about Reproduction in fish