Invasive crabs are a growing concern for New York City authorities, who are taking steps to protect native marine life and prevent flooding. The New York Department of Environmental Conservation (NYDEC) has issued a warning about hairy crabs, also known as eggplants, urging people who come across these crabs to freeze them and contact local authorities.
Hairy crabs have been spotted in the Hudson River, Nissequogue, and Long Island Sound estuaries. These light brown or olive-colored crabs develop pincers when mature and are characterized by thick brown bristles on their claws, hence the name “hairy crab.” Commercial shrimp trawlers brought hairy crabs to the United States in 1992, where they first established populations in San Francisco Bay.
Marine scientists are concerned that invasive hairy crabs could outcompete vulnerable local species and disrupt the food chain. These crabs move between salt and brackish water, potentially causing ecosystem disruption through competition with native marine life. NYDEC describes hairy crabs as predators native to East Asia that can change entire food webs as they hunt for native fish eggs and invertebrates.
The burrowing habits of hairy crabs can destabilize river banks, leading to increased erosion and the potential for flooding and habitat loss. NYDEC urges the public to check for and remove debris and mud from boats, trawlers, and equipment, and to be vigilant for hairy crabs. If people discover hairy crabs, they are advised to catch them
