Would there be an Intelligent Aquatic Civilization?

From the earliest histories of civilizations, underwater inhabitants are reported to coexist with people on the surface.
However, official science denies this state of affairs and humans are the pinnacle of biological development on Earth, the pinnacle of evolution, and there can be no intelligent inhabitants of the ocean, says traditional science.
But this could be wrong. In ancient times, a large colony of the Maya lived in what is now the territory of Belize, and there is evidence of cohabitation with representatives of the aquatic environment there, and there are some stories that in the first millennium BC a war broke out between the Maya and the inhabitants of the ocean.
The Mayan natives, who were forbidden to fish and gather food on the coast, announced the beginning of a confrontation. The Mayans would have won the war and received the right to total control of the coastal zone of Belize.
Ancient Stories of Aquatic Creatures
These stories are commonly told as legends and myths, but reports of encounters with Mermaids or Icthyanders in this region of Central America do not only date back to ancient times. During the Middle Ages, Spanish and Portuguese sailors, and later Turkish and Dutch merchants, wrote about these fantastic aquatic creatures. Indigenous peoples in Belize and neighboring places also support these stories.
During the Caribbean crisis, Soviet sailors and servicemen spoke, unofficially, of encounters with men and women who were different and, without equipment, diving deep into the water, swimming and maneuvering quickly.
In the late 1970s and 1980s, humanoid creatures with webbing between their fingers and toes began to appear in local fishermen’s nets. Many people questioned the absence of photos or bodies of these creatures, and the explanation given is that the scream of these underwater creatures puts people in a state of paralysis or stupor, similar to existing legends about the “song of sirens” in Greek literature, the that would allow humanoid sea creatures tangled in the nets time to escape back to the oceans.
In 2006, a local fisherman told how he once saw a girl and a boy in the ocean. They swam to a depth of 3 meters and then disappeared into the depths. Nearly half of people living in coastal regions of Belize and neighboring countries report similar stories.
In 2011, three fishermen tried to catch a boy they found underwater. They almost made it, but five men and 3 women came to the baby’s rescue. Using her cry, they easily brought the child back.
Until 2018, the hunt for these mysterious ocean dwellers was carried out legally. The country’s government promised to pay a reward of US$ 1.5 million to anyone who managed to capture one of these mysterious creatures, but this created many problems.
Fishermen and hunters returned from their journey with destroyed nets, cut hands and, in many cases, mild or severe hearing loss.
Finally, in 2018, the Belizean authorities abandoned the idea of capturing these creatures, deciding to live peacefully with that underwater civilization. However, the hunters continued their attempts, and to stop this, a law was introduced to confiscate fishing equipment and licenses.
From this moment on, instead of trying to capture the creatures, it was decided to photograph them, but no clear picture has been taken so far.