diff --git a/code/modules/events/carp_migration.dm b/code/modules/events/carp_migration.dm
index f573614666..b19349ccab 100644
--- a/code/modules/events/carp_migration.dm
+++ b/code/modules/events/carp_migration.dm
@@ -6,6 +6,9 @@
 	var/list/spawned_carp = list()
 
 /datum/event/carp_migration/setup()
+	if(prob(50)
+		kill()
+		return
 	announceWhen = rand(30, 60) // 1 to 2 minutes
 	endWhen += severity * 25
 	carp_cap = 2 + 3 ** severity // No more than this many at once regardless of waves. (5, 11, 29)