Isobe - Isobe

Japanese: イソベ - いそべ

…An annelid of the family Isocaeidae of the class Polychaeta (illustration). It has about 20 different names, including akamushi, emushi, isobe, doromushi, sembushi, honmushi, iwaisome, and hiramushi. It is distributed throughout Japan and was given this name because it lives in the crevices of rocks in the intertidal zone, but some species live in sand and mud such as tidal flats. …

From [Sugokai]

...It is a warm-water species that is distributed in the waters under the influence of the Kuroshio Current or the Tsushima Current, and lives from the intertidal zone to a depth of about 20m. It is called by various names in different regions, such as Fukuromushi, Isobe, Sumushi, Momushi, and Podumushi. It has a body length of 30 to 40cm and about 300 segments. ...

*Some of the terminology explanations that mention "Isobe" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…多毛綱イソメ科の環形動物（イラスト）。アカムシ，エムシ，イソベ，ドロムシ，セムシ，ホンムシ，イワイソメ，ヒラムシなど20ほどの別名がある。日本各地に分布し，潮間帯の岩の隙間にすむところからこの名がつけられたが，干潟のような砂泥中にすむものもある。…