22K views · 198 reactions | The life cycle Tadpole development This process varies according to the species and even the environment in which the animal is found, and can last between two and four years. And once the tadpole matures, the thyroid gland goes into action by producing a hormone that activates growth. #cycle #ciclos #estagio #stages #week #desenvolvimento #frog #sapos #aquarist #cachoeira #natureza #nature #cachoeirinha | Natural Fish Aquarium | Facebook