There are 1 pairs of antennae on the head of the cockroach family, which are ear-shaped; The head and neck are obvious, with 1 ear olfactory angle. The abdomen is wide and the rear end is tail-shaped, so it is named because it looks like a sitting rabbit when it is at rest. 19 species are known in China. Sea rabbits have developed lateral feet, which can be used as swimming organs. Other genera have small lateral feet. There are purple juice glands, which can release purple juice to kill small animals or avoid enemy harm.

Sea rabbits that eat algae scrape algae with powerful teeth and tongues, and often change their body color by scraping different algae. Species living on the seashore devour soil and sand, and mainly feed on benthic diatoms and small invertebrates. Androgyny. Two sea rabbits mate with each other or several sea rabbits mate in a string. 1 in front plays the female, 1 in the back plays the male, and the middle individual plays both the female and the male. Eggs are bound to seaweed and rocks. They are called sea strips in China and sea strips in Japan. They are delicious and edible. They are used in medicine to treat ophthalmia or as coolants. Sea rabbits contain sea rabbit toxin, and eating sea rabbit meat often causes dizziness, vomiting, blindness and other diseases, which are life-threatening in severe cases.