Evidence supports aquatic food consumption in "Homo" as early as the Pliocene, but its linkage to brain evolution remains controversial. Further, there is no evidence that humans ate fish in significant amounts earlier than tens to hundreds of thousands of years ago. Supporters argue that the avoidance of taphonomic bias is the problem, as most hominin fossils occur in lake-side environments, and the presence of fish remains is therefore not proof of fish consumption. They also claim that the archaeological record of human fishing and coastal settlement is fundamentally flawed due to postglacial sea level rise.