How do hagfishes find food?

Hagfishes, which are primitive vertebrates belonging to the superclass Agnatha, primarily locate their food using their sense of scent.12

When a hagfish detects the scent of a potential meal—such as a dead or crippled fish or various soft-bodied invertebrates—it emerges from its burrow to locate the source. Once it finds a carcass, the hagfish will coil around it and use its comblike, horny tooth plates to bite into the flesh. In some instances, they are known to bore directly into the bodies of fish caught in nets or on lines, consuming the prey from the inside.123