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Biting Back: Snakehead fish first made their appearance in tributaries of the Chesapeake Bay just less than a decade ago. The highly invasive species—which is, yes, a very ugly fish that resembles a snake—is native to Asia, and is marking now marking its territory in D.C.-area waterways. WTOP reports that local biologists have been stunned by the snakehead’s proliferation, which is cause for concern: “What is known is that the fish…are predators that could endanger native species.” Chessie, the mythical sea monster of the Chesapeake Bay, has some real-life competition! -1

Drying Off: Some Washington Harbour businesses that flooded in mid-April are on the mend. The Washington Business Journal reports: “Nick’s Riverside Grill and Tony & Joe’s Seafood have reopened their patios…Sequoia Restaurant also has reopened, according to its website and will serve a special menu for Mother’s Day.” Most had hoped to reopen in time for Mother’s Day, but there’s still heavy lifting to be done, especially work on interior spaces. +2

Keep Calm and Carry On? Yesterday, 29 letters with suspicious white powder sent to D.C. public schools were found. Today, 10 more have been discovered. The letters have all contained the suspicious white powder, a piece of paper with “AL-AQEDA-FBI” typed on it, an envelope with a sticker with the address typed on it, and a postmark from Dallas, Texas, leading officials to believe that the same source is responsible for all of the letters. NBC Washington notes: “So far, none of the letters has been found to contain hazardous substances, but the FBI is treating each letter found like it could be dangerous.” Still, it’s all somewhat troubling. -3

Garyland: University of Maryland basketball coach Gary Williams announced his retirement yesterday. The end of Williams’ 22-year tenure at the university, which saw 14 trips to the NCAA tournament, a 2002 national championship game, and more than a few players into the NBA, has devastated basketball fans and U-Md. alumni (particularly on Twitter). But Williams isn’t going too far just yet. Temporarily, he’ll act as an assistant to the university athletic director Kevin Anderson—and U-Md. President Wallace Loh proclaimed at Williams’ farewell ceremony today that he’ll work to name the court at Comcast Center after the venerated coach. +1

Yesterday’s Needle rating: 79 Today’s score: -1 Friday Bonus Points: +2 Today’s Needle rating: 80