What do you know about the migratory fish of the Potomac River?
Many fish of the Potomac River are "anadromous" which means they live much of their life in the ocean but return to fresh water to spawn. BUT one local species is "catadromous", living in fresh water but journeying to the ocean to spawn. Which is the Potomac's only catadromous species?
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Which of these species is NOT a migratory fish of the Potomac River?
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Bull sharks live in the ocean but can tolerate fresh water...in fact, they prefer to give birth in fresh water (baby sharks!) which is why they are sometimes spotted in the tidal Potomac. TRUE or FALSE: Bull sharks have attacked humans in the Potomac River and Chesapeake Bay.
True
False
Migratory fish can become seriously endangered when man-made structures block their paths. Luckily, innovations like eel-ways and fish ladders may help frustrated fish get back home. Evidence shows that a fish ladder in Rock Creek Park is successfully being used by which species?
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Atlantic Sturgeon are born in freshwater, swim out to sea as juveniles, and return to their birthplace to spawn when they reach adulthood. After nearly disappearing from the Potomac in the last century, they are now on the cusp of making a comeback. Which of the following facts about this fascinating fish is NOT true?
Sturgeons have been around for 120 million years. That means they shared the earth with the dinosaurs of the Cretaceous period.
The largest Atlantic sturgeon ever caught weighed 811 pounds.
Because of their tough exterior, sturgeons can easily survive pollution and poor water quality.
Sturgeons were a reliable food source for English settlers in the 1600s and they have been fished for their eggs (caviar) for centuries.
Fish are a great indicator of our river's health - that's why we use them to help give the Potomac River a grade every two years. Which formerly threatened migratory species has made a remarkable comeback, and scored an A grade, in our most recent report card?
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Also known as rockfish, striped bass are a "semi-anadromous" fish, meaning they don't travel all the way to the ocean - just to the tidal portions of rivers. While not all fish survive migration, these favorite fish of anglers live longer than you might think. How old was the oldest recorded striped bass?
12 years old
26 years old
31 years old
58 years old
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