海兎貝	0
ウミウサギガイ	1138
うみうさぎがい	0
海兎	1931
うみうさぎ	3590
ウミウサギ	995
GG5 (just 海兎)

I suspect some misparsing for ウミウサギガイ.
Probably better to trim it back to 海兎.

@@ -5 +5 @@
-<keb>海兎貝</keb>
+<keb>海兎</keb>
@@ -8 +8,5 @@
-<reb>ウミウサギガイ</reb>
+<reb>うみうさぎ</reb>
+</r_ele>
+<r_ele>
+<reb>ウミウサギ</reb>
+<re_nokanji/>
@@ -12 +16,3 @@
-<gloss>Ovula ovum, common name the common egg cowrie, is a species of sea snail, a marine gastropod mollusk in the family Ovulidae, the ovulids, cowry allies or false cowries.</gloss>
+<misc>&uk;</misc>
+<gloss>egg cowrie (Ovula ovum)</gloss>
+<gloss>shuttle shell</gloss>

https://ja.wikipedia.org/wiki/ウミウサギ

https://en.wikipedia.org/wiki/Ovula_ovum