Siboglinids are a characteristic feature of reducing environments. More than 75% of all siboglinids were found in the Sea of Okhotsk at a depth of less than 400 m, while some species are known to inhabit the abyssal depth in other regions. Among the six species of siboglinids encountered in the Sea of Okhotsk, only two are widespread: Siboglinum caulleryi and Oligobrachia dogieli. A significant number of all findings belong to the area where, according to geological data, the methane concentration varies between 0.22 and 4.46*10⁹ nmol/kg. There is a vast territory in the central part of the Sea of Okhotsk that is not inhabited by siboglinids and is characterized by minimum methane concentration values. Thus, data on the Sea of Okhotsk indicate that siboglinids are related to sites of methane seepage.

西柏油脂是减少环境的特征。在鄂霍次克海小于400 m的深度发现了超过75％的所有血吸虫，而在其他地区，则有一些物种居住在深渊中。在鄂霍次克海遇到的六种血吸虫中，只有两种分布广泛：西伯利亚gli（Siboglinum caulleryi）和多毛Ol（Oligobrachia dogieli）。根据地质数据，所有发现中有相当一部分属于甲烷浓度在0.22至4.46 * 10 ⁹之间变化的区域。 nmol / kg。鄂霍次克海的中部有一块广阔的土地，没有人归类在内，甲烷含量最低。因此，鄂霍次克海的数据表明，岩层岩层与甲烷渗透位点有关。