Lionfish was a male SeaWing soldier who accompanied Fathom to the Night Kingdom along with Indigo and another soldier, Wharf. Like Wharf, he was described to be lazy and sleepy. He often neglected his duties as Fathom's bodyguard, sleeping with Wharf inside Fathom's quarters provided by the NightWings.
Lionfish was one of the soldiers, along with Wharf and Indigo, who Queen Pearl told to go with Fathom to the Night Kingdom. He later killed Quickdeath, after the assassin-for-hire attempted to assassinate Darkstalker.
It is assumed that he went back to the Kingdom of the Sea when the NightWings evacuated, along with Wharf.
- A lionfish is a venomous type of saltwater fish.
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