Dusky smooth-hound time to induce tonic immobility in smooth dogfish was 32.5 seconds. The mean duration of the tonic immobility was 61.9 seconds. Sharks that had the “limp” response also exhibited tonic immobility. The “limp” response is a criterion for the onset of tonic immobility. Dusky smooth-hound The dusky smooth-hound ("Mustelus canis"), also called the smooth dogfish or the dog shark, is a species of houndshark in the family Triakidae. This shark is an olive grey or brown in color, and may have shades of yellow or grayish white. Females live to 16 years and males have a lifespan of 10 years.
Axehandle hound Axehandle hound The axehandle hound (sometimes spelled as axhandle hound, ax-handle hound, or similar), is an American fearsome critter of Minnesota and Wisconsin. Overall, it resembles a dog with a roughly axe-like shape. It has a head shaped like an axe blade hence the name, complemented by a handle-shaped body atop short stubby legs. It subsists on a diet consisting entirely on the handles of axes which have been left unattended. A nocturnal creature, the axehandle hound travels from camp to camp searching for its next meal. In Minnesota, there is a canoe-access campground named Ax-Handle Hound after the folklore