 Predators of "T. funebralis" include sea stars, crabs, octopuses, sea gulls, and sea otters.Experiments showed that "T. funebralis" will flee if it detects a predator nearby, and if already in motion, can increase its speed from 2–3 cm per minute to around 8 cm per minute.If the anterior portion of "T. funebralis" is touched by a predator, it can raise the front of the foot and make a 90° turn to escape.