Maine fishermen harvested a record-breaking $616.5 million of seafood and fish in 2015, despite hitting a five-year low in volume of the catch. The total value of commercial landings in 2015 was up 4.4 percent from 2014, while the total live weight of 276.5 million pounds was down 10.6 percent, according to figures released Thursday from the state Maine Department of Marine Resources.