Iemanja is a popular goddess in the Brazilian myths and she is the deity that has control over the waters. It is important to appease her with gifts such as flowers on New Year's day or the day before. If you are in the beach, light some candles and throw flowers toward the sea. There are some that make a small flotation device to put in bouquets of flowers as well as material goods. They say that if the goods were sent back, they were not accepted. It is fine. You can try it out again next time! It is a very spiritual thing based on the past and this tradition has been in existence even before the country had transformed Christianity in the predominant religion.