REGISTER_MONSTER(
/* MON_##id */ STINGRAY,
/* function */ m_stingray,
-/* spawnflags */ MONSTER_TYPE_SWIM | MONSTER_SIZE_BROKEN | MON_FLAG_MELEE,
+/* spawnflags */ MONSTER_TYPE_SWIM | MONSTER_SIZE_BROKEN | MON_FLAG_MELEE | MON_FLAG_MUTATORBLOCKED,
/* mins,maxs */ '-20 -20 -31', '20 20 20',
/* model */ "fish.mdl",
/* netname */ "stingray",