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乐亭县潮间带生物资源,除去贝类以外,蟹类占相当大的比重。此类动物与人类有着密切的关系,有些是沿海重要的捕捞对象(例三疣棱子蟹、日本(虫寻)等),有些是禽畜和鱼、虾养殖的饵料(例天津厚蟹,日本大眼蟹等),此外许多较小的种类也是鱼类和其他经济动物的天然饵料。通过调查、鉴定,本县潮间带共有蟹类14种,分隶于6科11属。本文对种类的形态特征不作赘述,仅对种类的生态、栖息环境、地理分布及经济意义作简要叙述。由于现场调查时间较短(82年9月14日至10月13日),限于季节,故所采到的标本不一定全面;加之水平所限,有关参考资料不足,错误在所难免,希予指正一、种类乐亭县潮间带蟹类有如下种类(外形特征见附图)
Laoting intertidal biological resources, except for shellfish, crabs accounted for a considerable proportion. Some of these animals are closely related to human beings. Some of them are important fishing targets along the coast (for example, three warty crabs, Japan (insect pest), etc.), and some are feed for poultry and fish and shrimp farming (for example, Japanese big-eyed crabs, etc.), and many smaller species are also natural bait for fish and other economically important animals. Through investigation and identification, there are 14 species of crabs in this intertidal zone, belonging to 11 genera of 6 families. This article will not go into details about the morphological characteristics of species, only a brief description of species ecology, habitat, geographical distribution and economic significance. Due to the short duration of on-site investigation (September 14 to October 13, 1982), seasonality is limited and the collected specimens may not be comprehensive. In addition, due to insufficient level of information, inadequate reference materials and errors are inevitable. Correction 1, species Laoting intertidal crabs have the following categories (shape characteristics see the attached map)