Panagis hauls himself out of the pool at a rehabilitation center in Greece and scurries over for a delectable lunch: whole mackerel. It’s been about three months since the orphaned seal pup was found struggling in the coastal waters of Cyprus. Panagis is one of dozens of Mediterranean monk seals, or Monachus monachus, that have been nursed back to health by Greece’s MOm, a charity dedicated to the care and protection of the rare marine mammal whose population had dwindled so dramatically that at one point it faced extinction.