Horizon Lines Inc., the state’s second-largest ocean shipper, said today it will lower its fuel surcharge for its mainland-Hawaii trade by 3.75 percentage points, to 21.75 percent from 25.50 percent, effective Sunday.

In addition, Horizon is also lowering its fuel surcharge between the mainland and Guam/Commonwealth of the Northern Mariana Islands by 3.75 percentage points, to 23.25 percent from 27 percent.

The moves match similar decreases announced last Friday by Matson Navigation Co.