The totoaba fish is a large, endangered species native to the Gulf of California in Mexico. It can grow up to 2 meters long and is known for its distinctive swim bladder, which is highly valued in traditional Chinese medicine. Due to overfishing and illegal trade, the totoaba population has drastically declined, leading to its classification as critically endangered. Efforts to protect the totoaba include stricter fishing regulations and conservation programs aimed at preserving its habitat. The decline of the totoaba also impacts the vaquita, a small porpoise that shares its habitat and is also critically endangered due to bycatch in illegal fishing nets.