What can jellyfish teach us about climate change? Warming of temperatures, oxygen depletion and ocean acidification, coupled with overfishing and invasive species, are giving jellyfish advantage over other marine life. Olindias phosphorica, or Cigar Jellyfish,is a small jellyfish that lives in warm waters. Half of the profit made with this series Medusae will be donated to WWF Mediterranean to help protect the Mediterranean Sea.