The Sea People is a species in Dave the Diver.
Similar to humans the Sea People, or Low-Dwellers as they call themselves, have humanoid torsos with fish-like lower bodies.
The Sea People in Dave the Diver live in the depths of the Blue Hole, hidden from humanity for centuries.
In the archeological finds around the Blue Hole, it was revealed to Dr. Bacon that the humans and Sea People lived together and could even have children.
Unfortunately due to miscommunication the two races went to war after the humans tried to eat the Divine Tree fruits that the Sea People gifted to the humans, causing the death of the ones who tried to eat the fruits.