diff --git a/beestation.dme b/beestation.dme
index b351733dc1e59..5b300777e55a9 100644
--- a/beestation.dme
+++ b/beestation.dme
@@ -2611,6 +2611,7 @@
 #include "code\modules\events\carp_migration.dm"
 #include "code\modules\events\communications_blackout.dm"
 #include "code\modules\events\creep_awakening.dm"
+#include "code\modules\events\diona_infestation.dm"
 #include "code\modules\events\disease_outbreak.dm"
 #include "code\modules\events\dolphin_migration.dm"
 #include "code\modules\events\dust.dm"
diff --git a/code/modules/events/diona_infestation.dm b/code/modules/events/diona_infestation.dm
new file mode 100644
index 0000000000000..ef2d878e128df
--- /dev/null
+++ b/code/modules/events/diona_infestation.dm
@@ -0,0 +1,37 @@
+/datum/round_event_control/diona_infestation
+	name = "Nymph Swarm"
+	typepath = /datum/round_event/diona_infestation
+	weight = 5
+	min_players = 5
+
+/datum/round_event/diona_infestation
+	var/spawncount = 5
+
+/datum/round_event/diona_infestation/proc/preRunEvent()
+	if(locate(/mob/living/simple_animal/hostile/retaliate/nymph) in GLOB.alive_mob_list)
+		return EVENT_INTERRUPTED
+
+/datum/round_event/diona_infestation/start()
+	var/list/vents = list()
+	for(var/obj/machinery/atmospherics/components/unary/vent_pump/temp_vent in GLOB.machines)
+		if(QDELETED(temp_vent))
+			continue
+		if(is_station_level(temp_vent.loc.z) && !temp_vent.welded)
+			var/datum/pipeline/temp_vent_parent = temp_vent.parents[1]
+			if(!temp_vent_parent)
+				continue//no parent vent
+			//Stops nymphs getting stuck in small networks.
+			if(temp_vent_parent.other_atmosmch.len > 20)
+				vents += temp_vent
+	if(!vents.len)
+		message_admins("An event attempted to spawn nymphs but no suitable vents were found. Shutting down.")
+		return MAP_ERROR
+	while(spawncount > 0 && vents.len)
+		var/obj/vent = pick_n_take(vents)
+		var/mob/living/simple_animal/hostile/retaliate/nymph/new_nymph = new(vent.loc)
+		spawncount--
+
+		announce_to_ghosts(new_nymph)
+		message_admins("[ADMIN_LOOKUPFLW(new_nymph)] has been spawned by an event.")
+		log_game("diona nymphs were spawned by an event.")
+	return SUCCESSFUL_SPAWN