diff --git a/code/__defines/mobs.dm b/code/__defines/mobs.dm
index 012677200c..e685d58e7e 100644
--- a/code/__defines/mobs.dm
+++ b/code/__defines/mobs.dm
@@ -261,6 +261,9 @@
 #define SPECIES_XENO_SENTINEL	"Xenomorph Sentinel"
 #define SPECIES_XENO_QUEEN		"Xenomorph Queen"
 
+// Metroid IDs
+#define SPECIES_METROIOD_QUEEN	"Metroid Queen"
+
 // Misc species. Mostly unused but might as well be complete.
 #define SPECIES_SHADOW			"Shadow"
 #define SPECIES_SKELETON		"Skeleton"
diff --git a/code/_macros.dm b/code/_macros.dm
index efd1e72edd..86d2efce84 100644
--- a/code/_macros.dm
+++ b/code/_macros.dm
@@ -44,6 +44,8 @@
 
 #define isslime(A) istype(A, /mob/living/simple_animal/slime)
 
+#define ismetroid(A) istype(A, /mob/living/simple_animal/hostile/metroid)
+
 #define isbot(A) istype(A, /mob/living/bot)
 
 #define isxeno(A) istype(A, /mob/living/simple_animal/xeno)