Purple Loosestrife (Lythrum salicaria)
Purple loosestrife is an exotic species which was found
in North America as early as the 1800's. It is native to Eurasia.
Loosestrife can be found near wetland sites, usually along rivers
and streams. Loosestrife is a highly invasive plant. It can impede
waterflow and have a strong impact on the biotic community.
Sea Lamprey (Petromyzon
marinus) on Trout
The sea lamprey is a parasitic fish that feeds
on large, slower-moving fish. The lamprey's mouth is filled with
sharp teeth which it uses to attach to fish so it can feed.
The sea lamprey is an exotic species that made its way into the
Great Lakes through the St. Lawrence River in the 1920's.
The sea lamprey can be seen migrating up rivers and streams in
the spring and summer to lay their eggs.