When an invertebrate reaches the stage, it most likely stops growing and can begin reproduction. beginning growth adult death

adult

Explanation:

Metamorphosis is a stage of life cycle of a invertebrate where an invertebrate undergoes various stages of transition starting from a small precursor to an adult. It initiates from the time the animal obtains it's birth and continued with cell growth and differentiation until the organism attains adulthood.

Generally, in adulthood the invertebrate stops growing in the form of cell growth and differentiation. As in adulthood the organism attains stability in it's morphological form and functions.