Interstitial fauna (English spelling)

…Sandy beaches are home to large in-fauna such as bivalves and crabs, but they are fewer in number than in rocky reef areas. However, tiny crustaceans, polychaetes, nematodes and other interstitial fauna are significantly more numerous in the sand. Eelgrass beds, which are seaweeds with true roots, often form offshore from sandy beaches.

*Some of the terminology that refers to "interstitial fauna" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…砂浜域には二枚貝やカニ類など大型の埋在性動物in‐faunaがすむが，岩礁域と比べて少ない。しかし微小な甲殻類，多毛類，線虫類などの間隙（かんげき）性動物interstitial faunaは砂中に著しく多い。砂浜の沖合には本当の根をもつ海草類の生育しているアマモ(アジモ)場ができることが多い。…

※「interstitial fauna」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報