While lower vertebrates contain adult stem cells (aSCs) that maintain homeostasis and drive un-exhaustive organismal growth. mammalian aSCs display mainly the homeostatic function. Here. we use lineage analysis in the medaka fish gill to address aSCs and report separate stem cell populations for homeostasis and growth. https://www.roneverhart.com/Tiamat-s-Rebuke-East-Non-Ladder/