Ohio River shrimp
... that until 2001, the Ohio River shrimp had not been seen in the Ohio River for 50 years?
... that until 2001, the <b id="mwBaM"><a href="./Macrobrachium_ohione" id="mwBaQ" rel="mw:WikiLink" title="Macrobrachium ohione">Ohio River shrimp</a></b> <i id="mwBaU">(pictured)</i> had not been seen in the <a href="./Ohio_River" id="mwBaY" rel="mw:WikiLink" title="Ohio River">Ohio River</a> for 50 years?