Cretaceous Shark Teeth from Big Brook, N.J.
(left) Scapanorhychus texanus (goblin shark tooth)
(middle) Cretolamna appendiculata (mackerel shark tooth)
(right) Squalicorax sp. (crow shark tooth)
Colt's Neck, New Jersey
The Squalicorax is the largest I've ever found, though frankh1847 found an even larger one the same day.