The best replacement for jellyfish is man of war.

The best alternatives to jellyfish are rated as following:
★★★★★  man of war
★★★★  squid
★★★  man of war sting
★★★  sea nettle
★★★  jellyfish
★★  electric eel
★★  sea jelly
★★  man-of-war
★★  man o war
★★  snowie
★  jellyfishes
★  sea anemone
★  gorgon
★  stingray
★  sea wasp
★  medusa
★  whale placenta
★  bee sting
★  sea lice
★  eel
★  box jellyfish
  blue ring octopus
  jelly fish
  sea nettles
  comb jellyfish
  lionfish
  jellies
  jelly balls
  jellywash
  portuguese man of war

Your alternative for jellyfish is not listed? Suggest!
Speaking about jellyfish, one probably shouldn't forget about tentacles lake.

Other search terms related to jellyfish and their ratings are:
★★★★★ tentacles lake
You have in mind a companion for jellyfish and it is not yet here? Propose!



Google Trends

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jellyfish
man of war
squid