Soletellina diphos (species of clam)
A specific species of bivalve; primarily a biological term. Usually written in katakana.
The Soletellina diphos is a type of bivalve that lives on sandy beaches.
Katakana spelling is common for this species name; usually written in kana.
Kanji spelling exists but is rarely used; the word is usually written in kana.
The name ムラサキガイ literally means 'purple shell', from 紫 (murasaki, 'purple') and 貝 (kai, 'shell'), referring to the shell's coloration.