An unknown potted Cryptocoryne species that is easy to grow in my bare bottom tanks.  This was started from a replanted runner in my fishroom and now takes up considerable space in a 16" x 48" 40 long tank.  I don't do anything than adding a very occasional root tab and some occasional Flourish Excel to keep algae from starting.  No fertilizing, no CO2, no special soil, only LED shop lights above the tanks.  My water is very hard.   The pot is 4" diameter.   This plant is getting root bound.   You could keep it as is, or you could split it up and replant in multiple new pots.  Guaranteed to have snails, could have Red Laser Rainbow (Melanotaenia rubrivittata) or Snyder barb eggs, they really like laying them in these crypts.