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Tracking catfish movements helps understand impact on food webs. Credit: Smithsonian Environmental Research Center

© NOAA Fisheries
Tracking catfish movements helps understand impact on food webs. Credit: Smithsonian Environmental Research Center photo copyright NOAA Fisheries taken at  and featuring the Fishing boat class
Fishing boat
How do scientists know where the fish go?
Understanding where fish spend their time—including where and when they migrate—is an important part of scientists' knowledge about species.
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