Southwest Airlines on August 1 will raise its cargo per-piece weight limit to 200 pounds from 150 pounds, the airline said Thursday. The per-piece seafood weight limit will also increase from 80 pounds to 175 pounds.

The airline said its eased restrictions will provide shippers with a "one-stop shop." For example, it is now possible to transport a whole tuna. "We are thrilled to offer our cargo customers this flexibility so Southwest Airlines can ship more of their packages," said Matt Buckley, Southwest's senior director of cargo. "While we can't be all things to all people, relaxing our weight restrictions improves our ability to meet the needs of our customers across our expansive route network."

Dallas-based Southwest Airlines Cargo will apply the new weight limit to all three levels of service, Next Flight Guaranteed, Rush Priority Freight, and Freight.