Did you know New Jersey has a state seashell? The violet is the state flower. And the state fruit is none other than the blueberry. But did you know there is a state seashell? New Jersey is only one of 14 states to have one. New Jersey's is the knobbed welk — a shell beachgoers have most likely seen after storms, said John Tiedemann, director of Marine and Environmental Biology and Policy at Monmouth University. The knobbed welk was designated New Jersey's state seashell in 1995. It's a large pear-shaped gastropod mollusk shell, coiling from left to right, yellowish-gray in color with brownish purple streaks. Many times you may not find the welk in tact. Instead, the middle is found which is the spirally inner-whirl of the welk, as he described it.