(1) These conditions support a rich diversity of invertebrate life and important game fisheries, such as brown trout, brook lamprey , salmon, crayfish, and otter.

(2) Litman next plans to look for novel immune genes in jawless vertebrates, such as lamprey and hagfish.

(3) Several fish, such as the sea lamprey , Atlantic sturgeon, alewife, Atlantic salmon and American eel live most of their lives in the ocean but enter freshwater to spawn.

(4) Sure enough, lampreys are simple vertebrates lacking jaws, teeth and a bony skeleton, whereas sharks are much more complex animals.

(5) Modern adult lampreys measure anywhere from about 6 to 40 inches long.