Our SpawnBalanceUtility is reporting the following error for your mod.

[29Aug2024 23:21:52.777] [Server thread/INFO] [com.mactso.spawnbalanceutility.util.Utility/]: L0:spawnbalanceutility : quark:stoneling Error, mob type MONSTER different than defined for the type of mob CREATURE
[29Aug2024 23:21:52.777] [Server thread/INFO] [com.mactso.spawnbalanceutility.util.Utility/]: L0:spawnbalanceutility : quark:toretoise Error, mob type MONSTER different than defined for the type of mob CREATURE
[29Aug2024 23:21:52.760] [Server thread/INFO] [com.mactso.spawnbalanceutility.util.Utility/]: L0:spawnbalanceutility : quark:foxhound Error, mob type MONSTER different than defined for the type of mob CREATURE

for

• Minecraft 1.20.1
• Quark-4.0-460.jar

This class of error can result in a mob not spawning, or spawning in excessive quantities.
If it's intentional on your part, never mind!

:-)

With Best Regards,
Two Guys,
MacTso

Hail Two Guys!
I went to take a look at this and found quark:stoneling listed under creature in the configs.

I dug a little deeper when looking into the fox hounds and it looks like the answer is actually BOTH. You can see on line 72 that its explicitly initiated as a CREATURE type. BUT, on line 80 it gets registered as a MONSTER type.