The Sea lamprey (Petromyzon marinus) is a parasitic lamprey found in the northern Atlantic Ocean along shores of Europe and North America, in the western Mediterranean Sea, and in the Great Lakes. It is brown, gray, or black on its back and white or gray on the underside and can grow up to 90 cm (35.5 in) long. After several years in freshwater ha...
• The common lamprey.
(from the article `agnathan`) ...transformed into a suctorial oral disk; the endostyle changes into a thyroid gland; and the fins along the back increase in height. On completion ... ...to about 45 kg (100 pounds), are caught by trolling in deep water. Lake trout spawn among reefs in fall, the heavy eggs sinking to the bottom. ... [2...
Sea' lam'prey (Zoology) The common lamprey. 
[n] - large anadromous lamprey sometimes used as food
Petromyzon marinus noun large anadromous lamprey sometimes used as food; destructive of native fish fauna in the Great Lakes