Gomphina melanegis (species of Venus clam)
A specific species of small clam found in Japan; primarily a biological term.
The Gomphina melanegis is a small bivalve found on sandy beaches in Japan.
Kanji spelling exists but is rarely used; the word is usually written in kana.
The name コタマガイ (小玉貝) literally means 'small ball shell', likely referring to its shape. The exact derivation is uncertain.