So the last humans alive try to make life on a spaceship by modifying some of the earth species that they had taken with them before the flood, including (and ESPECIALLY) some of the itemlabel critters. Thus making them similar to octarians. Unfortunately, they didn't know a different intelligent species had taken over the planet, so they accidentally "stole" the great zapfish because they thought it was just wildlife that was insignificant, Unfortunately they didn't know that the squidbeak splatoon would go after it.