Biome Glitch Discovery Ocean #4

That glitch proves this ocean is artificial. Not exactly news, eh? Could be worse, though. The first artificial ocean -- back in the 20th century -- was part of an experiment in a closed ecosystem. At first, their ocean thrived. They even grew a coral reef! But heaps of the species they introduced died off, and the researchers inside formed hostile factions and almost starved. Hmmm. Starving humans dividing themselves into tribes. Where have I heard that before?