The primary objective of Endless Ocean Luminous, a game similar to Subnotica is collecting Light by scanning creatures you come across during your dive. This Light is then sent back to Headquarters for further research, and you will earn additional points used for in-game currency. In addition, Tagging creatures you recently scanned is a helpful way to communicate with other divers by sharing locations of salvage, fish, and miracles, so they can prosper from your findings.