diff --git a/words/scales.txt b/words/scales.txt
index 6d24011d7..19db95cc5 100644
--- a/words/scales.txt
+++ b/words/scales.txt
@@ -318,3 +318,4 @@ uaru
 vimba
 wahoo
 zebra
+coelacanth
diff --git a/words/tails.txt b/words/tails.txt
index 70efa64f9..e851c6000 100644
--- a/words/tails.txt
+++ b/words/tails.txt
@@ -540,3 +540,4 @@ tailor
 uaru
 vimba
 wahoo
+coelacanth