The best replacement for lionfish is scorpion fish.

The best alternatives to lionfish are rated as following:
★★★★★  scorpion fish
★★★★  stonefish
★★★  goldfish
★  jellyfish
★  mantis shrimp
★  stone fish
★  clown trigger
★  tiger fish
★  lionfish
★  scorpionfish

Your alternative for lionfish is not listed? Suggest!
Speaking about lionfish, one probably shouldn't forget about triggerfish.

Other search terms related to lionfish and their ratings are:
★★★★★ triggerfish
★★★★ corals
★★★★ tangs
★★★ cleaner shrimp
★★★ puffer
★★★ anemone
★★★ seahorse
★★★ snowflake eel
★★ flame angel
★ porcupine puffer
★ yellow tang
picasso trigger
You have in mind a companion for lionfish and it is not yet here? Propose!



Google Trends

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lionfish
scorpion fish
stonefish