Answer:
Because most of it may be fertilized by sperm from the male invertebrate.
Step-by-step explanation:
Invertebrate animals are those that have no spine and skull. In general, they have a soft body, but in some cases have an exoskeleton (external skeleton) that helps in locomotion and protection against enemies.
Reproduction of invertebrate animals usually happens through the male and female gametes. However, there are some cases of asexual reproductions such as sponges and anemones. These animals lay large amounts of eggs, this is because most eggs are fertilized by the male invertebrate sperm.