An outbreak of whirling disease, caused by the parasite myxobolus cerabralis, has been discovered at the Rock Lake State Fish Hatchery in Santa Rosa, New Mexico, leading to the euthanization of around 70,000 fish and the loss of 225,000 fish across state hatcheries. This is the first time the parasite has been found in any New Mexico hatchery since 2007. The disease affects the cartilage tissue of fish and can be spread by adult carriers. The source of the contamination is under investigation, with the Pecos River being a likely cause.