MME and eye infection: Since CD10 is known as a marker for hematopoiesis progenitor and stem cells (44, 51), the presence of CD10 cells in ocular tissue raises the possibility that wild lumpfish might utilize a form of ocular extramedullary hematopoiesis, which has been described in mammals (52, 53) for specific adaptations such as during response to ocular infection by pathogens.