The European eel, a catadromous fish
species, is commonly found in the Sea of Galilee as well as in coastal
streams and pools in Israel. Catadromous fish migrate from their usual
freshwater habitats to saltwater areas to breed (afterward, the females die).
The European eel is a bottom dweller with limited hearing and vision. To
orient during migration, it uses its ability to sense magnetic fields. With a
lifespan of up to 20 years, it grows up to half a meter in length, and its
coloration changes throughout its life. It is also an endangered species.
Rising sea levels and storm surges will
lead to an increase in the Yarkon River’s salinity, extending eastward all
the way to Seven Mills (Sheva Tahanot). Absorbing the salt will cause the
body of the eel — normally covered in a mucus layer that helps the eel swim —
to dry out and shrivel. To adapt, the eel will shrink and develop a new
protective layer.
To clean its immediate surroundings
before attaching itself to rocks, as it usually does, the eel will use its
unique movement abilities and rub against rocks to remove the salt that
covers them. To cope with a potential drop in water oxygen levels, especially
near the bottom, where it lives, the European eel will learn to rely on blue
water lilies and use their long roots to ascend and swim closer to the
surface.
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