Lingcod Trap (IMAGE) University of Washington Caption This is an example of the new lingcod fishing gear. The two 'wings' guide fish into tunnels that lead into the main chamber. A grid resembling a tic-tac-toe board keeps large flat fish (like halibut) out, while letting lingcod in. If other fish do get inside the chamber, the trap is designed to let smaller fish swim out through the sides and top and flat fish shimmy out the bottom. Credit The Nature Conservancy Usage Restrictions Photo credit required. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.