10,000 - 100,000 individuals
Comments: Prior to 1890, there were an estimated 180,000 adult females in the Delaware Bay population (the largest east coast population), and approximately 20,000 in Chesapeake Bay, 29,000 in the southern Atlantic states (North Carolina, South Carolina, Georgia, Florida), and 6,000 in the Hudson River (Secor 2002).
Lake (1992) reported that the Atlantic and Gulf Coast spawning population (including the Hudson River) is 10,000 to 100,000 adults. Dovel and Breggren (1983) estimated that the juvenile population in the Hudson River alone matches these numbers.
Recently, 275 adults were collected off the coast of New Jersey (Johnson et al. 1997).