Hornwort
Ceratophyllum demersum
Size: to 10 ft
Habitat: beneath the surface in quiet waters
Notes: May form dense thickets
There aren't too many options for freshwater diving around here. That's not to say that you can't try jumping into any body of water you find, but most of them are likely to be pretty awful, and a few could get you arrested. Two good freshwater dives in the region are Round Valley Reservoir and the Delaware River Water Gap. Some diving is also done in Lake Hopatcong, although access is a problem.
More: Freshwater Dive Sites ...