For the manatee "Boo", the date is more than that: it represents half a century of research and service to science in the Amazon.
The female helped researchers from the National Amazon Research Institute (Inpa), in Manaus, to better understand the species and is now one of the most beloved attractions there.
Boo arrived at Inpa's headquarters in 1974, the same year that the institute began developing the Peixe-boi project.
The focus is to study the species, which is only born and reproduces in the fresh waters of the largest tropical forest in the world.
She was just a few days old, measured 1.16 meters and weighed 26 kg.
With the mammal, researchers were able to understand the behavior of an entire species, habits and the transition from breast milk to food.
Boo gave birth to four puppies and adopted others that arrived at Inpa.
Of these three, they survived and also live at the institute.
In Boo's aquarium, the researchers also saw the growth process of the babies and the moment they needed to leave their mother.
According to the Chico Mendes Institute for Biodiversity Conservation (ICMBio), the species is considered critically endangered in Brazil.
Intense hunting in the colonial period decimated entire populations of manatees, causing their extinction in the states of Espírito Santo, Bahia and Sergipe.

Source: Amazon Agency