I am trying to remove animalium:piranha from all ocean biomes. Would this be in spawns or potentialspawns?

I can easily deny them from spawning period so I know its working.

[
{
"mob":["animalium:piranha"],
"result": "allow"
},
{
"remove": "true",
"biome": "Ocean"
}
]

I thought something like this but doesn't appear so. This is my first go at this sort of customization.

Decided to try this route instead
https://pastebin.com/tnBiT21n

Except alls it does is spawn thousands of the mob at once.