The frilled shark has remained largely unchanged for 80 million years. Named for the frilled appearance of their gill slits, these eel-like sharks grow up to 6.6 feet long and loiter at depths of up to 5,150 feet. Their hunting method is straightforward: they lunge at prey and swallow it whole using their 300 prong-pointed teeth to guarantee nothing escapes.
The small cookie-cutter shark packs the punch of Glass Joe to its food sources, but still manages to get a good meal. Measuring just 16 to 22 inches, it attaches to larger animals with suction cup lips and carves out chunks of flesh, leaving cookie-shaped wounds. During the day, they inhabit depths of up to 12,100 feet and migrate to shallower waters at night to feed, targeting everything from fish to whales.