diff --git a/code/modules/mob/living/simple_animal/friendly/carp.dm b/code/modules/mob/living/simple_animal/friendly/carp.dm
index ea669271567..b0d5b723b40 100644
--- a/code/modules/mob/living/simple_animal/friendly/carp.dm
+++ b/code/modules/mob/living/simple_animal/friendly/carp.dm
@@ -21,6 +21,7 @@
 	response_help = "brushes"
 	response_disarm = "attempts to push"
 	response_harm = "injures"
+	blood_overlay_icon = 'icons/mob/npc/blood_overlay_carp.dmi'
 	gender = NEUTER
 	faction = "carp"
 	flying = TRUE
@@ -50,6 +51,14 @@
 
 	possession_candidate = TRUE
 
+/mob/living/simple_animal/carp/update_icon()
+	..()
+	if(resting || stat == DEAD)
+		blood_overlay_icon = 'icons/mob/npc/blood_overlay.dmi'
+	else
+		blood_overlay_icon = initial(blood_overlay_icon)
+	handle_blood_overlay(TRUE)
+
 /mob/living/simple_animal/carp/fall_impact()
 	src.visible_message(SPAN_NOTICE("\The [src] gently floats to a stop."))
 	return FALSE
diff --git a/code/modules/mob/living/simple_animal/hostile/carp.dm b/code/modules/mob/living/simple_animal/hostile/carp.dm
index 6c4358062c5..eae113d0fe7 100644
--- a/code/modules/mob/living/simple_animal/hostile/carp.dm
+++ b/code/modules/mob/living/simple_animal/hostile/carp.dm
@@ -20,6 +20,7 @@
 	health = 25
 	mob_size = 10
 
+	blood_overlay_icon = 'icons/mob/npc/blood_overlay_carp.dmi'
 	harm_intent_damage = 8
 	melee_damage_lower = 15
 	melee_damage_upper = 15
@@ -46,6 +47,14 @@
 	see_in_dark = 8
 	see_invisible = SEE_INVISIBLE_NOLIGHTING
 
+/mob/living/simple_animal/hostile/carp/update_icon()
+	..()
+	if(resting || stat == DEAD)
+		blood_overlay_icon = 'icons/mob/npc/blood_overlay.dmi'
+	else
+		blood_overlay_icon = initial(blood_overlay_icon)
+	handle_blood_overlay(TRUE)
+
 /mob/living/simple_animal/hostile/carp/Allow_Spacemove(var/check_drift = 0)
 	return 1	//No drifting in space for space carp!	//original comments do not steal
 
diff --git a/code/modules/mob/living/simple_animal/hostile/giant_spider.dm b/code/modules/mob/living/simple_animal/hostile/giant_spider.dm
index 4ad5377b219..b6cb5506849 100644
--- a/code/modules/mob/living/simple_animal/hostile/giant_spider.dm
+++ b/code/modules/mob/living/simple_animal/hostile/giant_spider.dm
@@ -21,6 +21,7 @@
 	response_help  = "pets"
 	response_disarm = "gently pushes aside"
 	response_harm   = "pokes"
+	blood_overlay_icon = null
 	stop_automated_movement_when_pulled = 0
 	maxHealth = 200
 	health = 200
diff --git a/code/modules/mob/living/simple_animal/hostile/hivebot.dm b/code/modules/mob/living/simple_animal/hostile/hivebot.dm
index 8f5ac470cd5..50da1d7a402 100644
--- a/code/modules/mob/living/simple_animal/hostile/hivebot.dm
+++ b/code/modules/mob/living/simple_animal/hostile/hivebot.dm
@@ -14,6 +14,7 @@
 	icon = 'icons/mob/npc/hivebot.dmi'
 	icon_state = "hivebot"
 	blood_type = "#000000"
+	blood_overlay_icon = 'icons/mob/npc/blood_overlay_hivebot.dmi'
 	health = 15
 	maxHealth = 15
 	harm_intent_damage = 3
@@ -48,6 +49,20 @@
 /mob/living/simple_animal/hostile/hivebot/get_bullet_impact_effect_type(var/def_zone)
 	return BULLET_IMPACT_METAL
 
+/mob/living/simple_animal/hostile/hivebot/update_icon()
+	..()
+	if(resting || stat == DEAD)
+		blood_overlay_icon = 'icons/mob/npc/blood_overlay.dmi'
+	else
+		blood_overlay_icon = initial(blood_overlay_icon)
+	handle_blood_overlay(TRUE)
+
+/mob/living/simple_animal/hostile/hivebot/get_blood_overlay_name()
+	if(stance == HOSTILE_STANCE_IDLE)
+		return "blood_overlay"
+	else
+		return "blood_overlay_armed"
+
 /mob/living/simple_animal/hostile/hivebot/guardian
 	health = 80
 	maxHealth = 45
@@ -227,6 +242,7 @@
 	icon_living = "hivebotbeacon_active"
 	health = 300
 	maxHealth = 300
+	blood_type = "#000000"
 	projectilesound = 'sound/weapons/taser2.ogg'
 	projectiletype = /obj/item/projectile/beam/hivebot
 	wander = 0
@@ -505,6 +521,8 @@
 	icon_state = "hivebotharvester"
 	health = 100
 	maxHealth = 100
+	blood_type = "#000000"
+	blood_overlay_icon = 'icons/mob/npc/blood_overlay_hivebot.dmi'
 	harm_intent_damage = 3
 	melee_damage_lower = 30
 	melee_damage_upper = 30
@@ -722,6 +740,11 @@
 			icon_state = "hivebotharvester_ripping"
 	else
 		icon_state = "hivebotharvester"
+	if(resting || stat == DEAD || busy)
+		blood_overlay_icon = 'icons/mob/npc/blood_overlay.dmi'
+	else
+		blood_overlay_icon = initial(blood_overlay_icon)
+	handle_blood_overlay(TRUE)
 
 /mob/living/simple_animal/hostile/retaliate/hivebotharvester/proc/prospect()
 
diff --git a/code/modules/mob/living/simple_animal/hostile/icarus_drone.dm b/code/modules/mob/living/simple_animal/hostile/icarus_drone.dm
index f06add5efab..3c3c95844ab 100644
--- a/code/modules/mob/living/simple_animal/hostile/icarus_drone.dm
+++ b/code/modules/mob/living/simple_animal/hostile/icarus_drone.dm
@@ -19,6 +19,7 @@
 	stop_automated_movement_when_pulled = FALSE
 	health = 300
 	maxHealth = 300
+	blood_type = "#000000"
 	speed = 8
 	projectiletype = /obj/item/projectile/beam/drone
 	projectilesound = 'sound/weapons/laser3.ogg'
diff --git a/code/modules/mob/living/simple_animal/hostile/moghesfauna.dm b/code/modules/mob/living/simple_animal/hostile/moghesfauna.dm
index 74d5cbe08a2..6bfc4f648cb 100644
--- a/code/modules/mob/living/simple_animal/hostile/moghesfauna.dm
+++ b/code/modules/mob/living/simple_animal/hostile/moghesfauna.dm
@@ -16,6 +16,7 @@
 	response_help  = "pets"
 	response_disarm = "shoves"
 	response_harm   = "harmlessly punches"
+	blood_overlay_icon = null
 	maxHealth = 450
 	health = 450
 	harm_intent_damage = 0
diff --git a/code/modules/mob/living/simple_animal/hostile/morph.dm b/code/modules/mob/living/simple_animal/hostile/morph.dm
index 928dd5bc8d7..dbf72fef369 100644
--- a/code/modules/mob/living/simple_animal/hostile/morph.dm
+++ b/code/modules/mob/living/simple_animal/hostile/morph.dm
@@ -48,6 +48,7 @@
 
 	attacktext = "glomped"
 	attack_sound = 'sound/effects/blobattack.ogg'
+	blood_overlay_icon = null
 
 	var/morphed = FALSE
 	var/melee_damage_disguised = 0
diff --git a/code/modules/mob/living/simple_animal/hostile/pra.dm b/code/modules/mob/living/simple_animal/hostile/pra.dm
index 3841f4fab30..9f6269b58e0 100644
--- a/code/modules/mob/living/simple_animal/hostile/pra.dm
+++ b/code/modules/mob/living/simple_animal/hostile/pra.dm
@@ -9,6 +9,7 @@
 	icon_state = "republicon"
 	icon_living = "republicon"
 	icon_dead = "republicon_dead"
+	blood_type = "#000000"
 	speak_chance = 5
 	turns_per_move = 3
 	organ_names = list("chest", "lower body", "left arm", "right arm", "left leg", "right leg", "head")
diff --git a/code/modules/mob/living/simple_animal/hostile/spider_queen.dm b/code/modules/mob/living/simple_animal/hostile/spider_queen.dm
index 12c95b0ab39..26c7fa8cb6a 100644
--- a/code/modules/mob/living/simple_animal/hostile/spider_queen.dm
+++ b/code/modules/mob/living/simple_animal/hostile/spider_queen.dm
@@ -16,6 +16,7 @@
 	response_help  = "pets"
 	response_disarm = "gently pushes aside"
 	response_harm   = "pokes"
+	blood_overlay_icon = null
 	stop_automated_movement_when_pulled = 0
 	maxHealth = 700
 	health = 700
diff --git a/code/modules/mob/living/simple_animal/hostile/tree.dm b/code/modules/mob/living/simple_animal/hostile/tree.dm
index 583ec3029dd..91b9dbbe44e 100644
--- a/code/modules/mob/living/simple_animal/hostile/tree.dm
+++ b/code/modules/mob/living/simple_animal/hostile/tree.dm
@@ -13,6 +13,7 @@
 	response_help = "brushes"
 	response_disarm = "pushes"
 	response_harm = "hits"
+	blood_overlay_icon = null
 	speed = -1
 	maxHealth = 250
 	health = 250
diff --git a/code/modules/mob/living/simple_animal/simple_animal.dm b/code/modules/mob/living/simple_animal/simple_animal.dm
index d028cd278c5..cce6bb30fe3 100644
--- a/code/modules/mob/living/simple_animal/simple_animal.dm
+++ b/code/modules/mob/living/simple_animal/simple_animal.dm
@@ -1,3 +1,9 @@
+#define BLOOD_NONE "none"
+#define BLOOD_LIGHT "light"
+#define BLOOD_MEDIUM "medium"
+#define BLOOD_HEAVY "heavy"
+
+
 /mob/living/simple_animal
 	name = "animal"
 	icon = 'icons/mob/npc/animal.dmi'
@@ -13,7 +19,12 @@
 	var/icon_living = ""
 	var/icon_dead = ""
 	var/icon_gib = null	//We only try to show a gibbing animation if this exists.
+
+	appearance_flags = KEEP_TOGETHER
 	var/blood_type = "#A10808" //Blood colour for impact visuals.
+	var/blood_overlay_icon = 'icons/mob/npc/blood_overlay.dmi'
+	var/blood_state = BLOOD_NONE
+	var/image/blood_overlay
 
 	var/list/speak = list()
 	var/speak_chance = 0
@@ -180,6 +191,7 @@
 	if(health > maxHealth)
 		health = maxHealth
 
+	handle_blood_overlay()
 	handle_stunned()
 	handle_weakened()
 	handle_paralysed()
@@ -303,6 +315,34 @@
 	if(purge)
 		purge -= 1
 
+/mob/living/simple_animal/proc/handle_blood_overlay(var/force_reset = FALSE)
+	if(!blood_overlay_icon)
+		return
+
+	var/current_blood_state = blood_state
+	var/blood_mod = health / maxHealth
+	if(blood_mod > 0.9)
+		blood_state = BLOOD_NONE
+	else if(blood_mod >= 0.7)
+		blood_state = BLOOD_LIGHT
+	else if(blood_mod >= 0.4)
+		blood_state = BLOOD_MEDIUM
+	else
+		blood_state = BLOOD_HEAVY
+
+	if(force_reset || (blood_state != BLOOD_NONE && current_blood_state != blood_state))
+		if(blood_overlay)
+			cut_overlay(blood_overlay)
+		var/blood_overlay_name = get_blood_overlay_name()
+		var/image/I = image(blood_overlay_icon, src, "[blood_overlay_name]-[blood_state]")
+		I.color = blood_type
+		I.blend_mode = BLEND_INSET_OVERLAY
+		blood_overlay = I
+		add_overlay(blood_overlay)
+
+/mob/living/simple_animal/proc/get_blood_overlay_name()
+	return "blood_overlay"
+
 /mob/living/simple_animal/proc/handle_eating()
 	var/list/food_choices = list()
 	for(var/obj/item/reagent_containers/food/snacks/S in get_turf(src))
@@ -488,6 +528,9 @@ mob/living/simple_animal/bullet_act(var/obj/item/projectile/Proj)
 	visible_message(SPAN_DANGER("\The [src] has been attacked with \the [O] by \the [user]."))
 	user.do_attack_animation(src)
 
+/mob/living/simple_animal/apply_damage(damage, damagetype, def_zone, blocked, used_weapon, damage_flags)
+	. = ..()
+	handle_blood_overlay()
 
 /mob/living/simple_animal/movement_delay()
 	var/tally = 0 //Incase I need to add stuff other than "speed" later
@@ -532,11 +575,11 @@ mob/living/simple_animal/bullet_act(var/obj/item/projectile/Proj)
 /mob/living/simple_animal/death(gibbed, deathmessage = "dies!")
 	walk_to(src,0)
 	movement_target = null
-	icon_state = icon_dead
-	density = 0
+	density = FALSE
 	if (isopenturf(loc))
 		ADD_FALLING_ATOM(src)
-	return ..(gibbed,deathmessage)
+	. = ..(gibbed, deathmessage)
+	update_icon()
 
 /mob/living/simple_animal/ex_act(severity)
 	if(!blinded)
@@ -766,3 +809,8 @@ mob/living/simple_animal/bullet_act(var/obj/item/projectile/Proj)
 		return /obj/effect/gibspawner/robot
 	else
 		return /obj/effect/gibspawner/generic
+
+#undef BLOOD_NONE
+#undef BLOOD_LIGHT
+#undef BLOOD_MEDIUM
+#undef BLOOD_HEAVY
\ No newline at end of file
diff --git a/html/changelogs/geeves-blood_overlay.yml b/html/changelogs/geeves-blood_overlay.yml
new file mode 100644
index 00000000000..b0b8dbe2e5a
--- /dev/null
+++ b/html/changelogs/geeves-blood_overlay.yml
@@ -0,0 +1,6 @@
+author: Geeves
+
+delete-after: True
+
+changes: 
+  - rscadd: "Added blood overlays to simple mobs."
\ No newline at end of file
diff --git a/icons/mob/npc/blood_overlay.dmi b/icons/mob/npc/blood_overlay.dmi
new file mode 100644
index 00000000000..6c8cf088cc0
Binary files /dev/null and b/icons/mob/npc/blood_overlay.dmi differ
diff --git a/icons/mob/npc/blood_overlay_carp.dmi b/icons/mob/npc/blood_overlay_carp.dmi
new file mode 100644
index 00000000000..1f2afb1b7db
Binary files /dev/null and b/icons/mob/npc/blood_overlay_carp.dmi differ
diff --git a/icons/mob/npc/blood_overlay_hivebot.dmi b/icons/mob/npc/blood_overlay_hivebot.dmi
new file mode 100644
index 00000000000..f3f795dc56e
Binary files /dev/null and b/icons/mob/npc/blood_overlay_hivebot.dmi differ