Nick Morley, left, and Matthew Burnham with team Locked n Loaded, currently in the lead for heaviest fish with their 832-pound tuna. Andrew Morley photo Staff and volunteers handle a 710-pound tuna Sept. 3 during the fourth annual Boothbay Harbor Tuna Challenge. FRITZ FREUDENBERGER/Boothbay Register The Endorfin team was leading the overall weight category as of Sept. 3. FRITZ FREUDENBERGER/Boothbay Register Jax van der Veen, chair of the tuna challenge committee, helps clean out a fish before weighing. FRITZ FREUDENBERGER/Boothbay Register UMaine scientists record data on donated and discarded fish parts to better understand the fishery and inform the agencies managing it. FRITZ FREUDENBERGER/Boothbay Register Seth Richards prepares a fish for market. FRITZ FREUDENBERGER/Boothbay Register FRITZ FREUDENBERGER/Boothbay Register FRITZ FREUDENBERGER/Boothbay Register FRITZ FREUDENBERGER/Boothbay Register FRITZ FREUDENBERGER/Boothbay Register FRITZ FREUDENBERGER/Boothbay Register FRITZ FREUDENBERGER/Boothbay Register FRITZ FREUDENBERGER/Boothbay Register FRITZ FREUDENBERGER/Boothbay Register FRITZ FREUDENBERGER/Boothbay Register FRITZ FREUDENBERGER/Boothbay Register FRITZ FREUDENBERGER/Boothbay Register FRITZ FREUDENBERGER/Boothbay Register FRITZ FREUDENBERGER/Boothbay Register FRITZ FREUDENBERGER/Boothbay Register FRITZ FREUDENBERGER/Boothbay Register FRITZ FREUDENBERGER/Boothbay Register