Facts about Sea lamprey

15 facts about Sea lamprey
Lampricides are chemical compounds designed to harm sea lamprey's larvae.
It is being used in ecosystems invaded by lampreys, where they endanger local fauna. Usage of lampricides is safe as it does not harm any other aquatic organisms.
Invasion of Great Lakes.
In 1835, the sea lamprey was first observed in Lake Ontario. Due to Niagara Falls, lampreys were unable to spread further into other Great Lakes. Unfortunately, the improvements conducted in the early 1900s to the Welland Canal infrastructure, a bypass of Niagara Falls, were enough for the lampreys to begin their invasion.

First was Lake Eerie in 1921, Lake Huron in 1936, Lake Michigan in 1937, and finally Lake Superior a year later.
Being an invasive species, sea lamprey found no natural predators, competitors, parasites, or pathogens in the Great Lakes.
Without proper population control, their numbers multiplied and became detrimental to the local ecosystem.
Why are sea lampreys so detrimental to the Great Lakes ecosystem?
In their natural habitat - an Arctic Ocean - fish are accustomed to lampreys, so in most cases, their parasitic activity does not kill marine fish. Great Lakes fish did not co-evolve with lampreys, and their organisms are not adapted to this type of injury and anticoagulant enzymes.
Sea lampreys can be found deep under the sea.
Specimens of the sea lamprey have been recorded at depths of 4000 m (2,5 mi).