Sea rat, also known as sea hammer, is rarely eaten by people. At present, it is doubtful whether the sea rat has nutritional value, so it is not recommended to eat it, and it is said that the sea hammer contains toxic saponins. Sea hammer, also known as sea rat, is spindle-shaped, about 10 cm long, and its back end extends into a tail shape. When living, the tail length is 1.5 times the body length, and there are 15 tentacles, each of which has four fingerlike branchlets, and the upper two branches are larger. When living, the body is flesh-colored or grayish purple, and the hidden layer lives in the sand. There is often a pile of sediment at the mouth of the cave, and there is a depression nearby. Here is its head, so it needs to be quick when collecting.
Extended data:
The body is oval and spindle-shaped, with a slender tail at the back. The body wall is soft and smooth, light flesh-colored or grayish purple, translucent, and there are fifteen tentacles around the mouth, which often lurks in the sand near the low tide line.
Cave dwellings in the sand near the bottom tide line are widely distributed in China, from Dalian, Liaoning to Zhanjiang, Guangdong, especially along the Yellow Sea. According to theory, it contains toxic saponins.
Reference: Sea Hammer _ Baidu Encyclopedia