Using Chunky to pre-generate a world on my server, and im running into an issue where there are over 8K+ manatees somewhere on the server, i would like to keep them as they are an awesome addition to the modpack. Any reccommendations?

I know i cant do a mass cull or it would basically remove your mod, so is there any way i can cull only the manatees and then decrease their spawnrate for future chunk generation??

you can use the Badmobs mod and remove Manatees from natural spawn list.