Which species survived and adapted to fresh water from Champlain Sea times (~ 10,000 years ago)?

Some dune plants, like beach heath (Hudsonia tomentosa ), Champlain beach grass (Ammophila champlainensis) and beach pea (Lathyrus japonicus) are relics of Champlain Sea times. The following fish probably survived from the Champlain Sea: Atlantic salmon (Salmo salar), rainbow smelt (Osmerus mordax), cisco (Coregonus artedii), and sea lamprey (Petromyzon marinus). Scientists are confident that salmon and smelt arrived here with the Champlain Sea. While there is still some doubt about sea lamprey and cisco (or lake herring), recent genetic evidence indicates that Lake Champlain sea lamprey may be survivors from the Champlain Sea rather than recent invaders. Cisco (Coregonus artedii) may have come with the Champlain Sea, or may have survived from the ocean invasion of the Mississippian era (300 million years ago)—or maybe both. The freshwater drum or sheepshead (Aplodinotus grunniens) and the lake trout (Salvilinus namycush) appear on some lists, but local scientists believe they are purely freshwater species.

http://www.lcbp.org/fwsum.htm

http://www.vtfishandwildlife.com/fish_sportfish.cfm

http://lcbp.org/Atlas/HTML/nat_geology.htm