Great post! There is a CGI animated television series called The Deep.

"The series follows the Nektons, a family of adventurous underwater explorers who live aboard a state-of-the-art submarine called the Aronnax and explore unknown areas of the Earth's oceans to unravel the mysteries of the depths."

Interesting: nekton, aronnax, nereus, lemuria

"Now, thanks to family friend Nereus, the Nektons know why they are so attracted to solving underwater riddles; because they are the descendants of Lemurians."

https://en.wikipedia.org/wiki/The_Deep_(TV_series)