the Essence of the Sea/Sea Essence;

• the essence is an underwater substance coming from the core of the sea, it gives life, heals wounds, resurrects the dead, and turns them into specters. the essence becomes a major part of the Ab'Rythulians' religion and worshipping the sea. it's a bluer, jelly-like substance that can be easily stored in jars, it does not have a taste

the Ocean's Essence of Life;

• The blue bubbles are seen in the coral reef temples when the essence of the sea is poured into the ocean bubbles, the bubble quickly repopulate areas with life native to that part of the sea, the ocean's essence of life is located in the spirit realm

the Sea Pearl;

• a giant blue pearl, it was a gift from the sea itself, there were two sea pearls gifted to the Ab'Rythulians before the collapse, they were gifted during the "blue moon harvest"

Blue Moon Harvest;

• the harvest is an event in which the sea gives out balls of the essence of the sea, on hyper blue moons ][which are much rarer in the Abzu universe than in real life][, which happened only twice, the sea gave the Ab'Rythulians two sea pearls, one each hyper blue moon

The Coral Reef Temples;

• The coral reef temples are places where the ocean's essence of life is located and kept safe from the dangers of the world of the living

Great Machines;

• Machines created by the Ab'Rythulians that went sentient and destroyed their creators, along side the marine life in the ocean