The commercial fisheries volume of production in Ilocos Region  was posted at 506 metric tons in the 1^st quarter 2021. The output  was lower by 8.81 percent than the level in 1^st quarter 2020  of 555 metric tons. 

The decrease in output of Ilocos Sur and Pangasinan pulled down  the overall commercial fisheries production of the region. 

In terms of provincial shares, Pangasinan accounted for 51.52 percent  of the region’s commercial fisheries volume of production in 1^st quarter 2021. The province recorded a production of 261 metric tons, lower than the output in 1^st quarter 2020 of 331 metric tons. Lesser fishing trips  and hours spent in the fishing grounds brought by frequent gale warnings and early occurrence of northeasterly winds contributed to the lower volume of catch.  

The top five major catch in the region during the 1^st quarter 2021  were skipjack, slipmouth, threadfin bream, squid, and roundscad. 

The top five major catch in Pangasinan during the quarter  were roundscad, big-eyed scad, threadfin bream, indian mackerel,  and slipmouth. 

La Union shared 37.28 percent to the total commercial fish catch  of the region in 1^st quarter 2021 and posted increment in output.  From the 164 metric tons recorded in the 1^st quarter 2020, production grew  to 189 metric tons in the 1^st quarter 2021 due to increased number  of fishing days, presence of more school of fish, and bigger sizes of catch.

The top five major catch in La Union during the quarter were slipmouth, squid, threadfin bream, hairtail and indian mackerel. 

Ilocos Sur contributed 11.20 percent to the total commercial fisheries volume of production in the 1^st quarter 2021. Its production of 57 metric tons, went down by 5.47 percent from the 60 metric tons output  in 1^st quarter 2020. Lesser fishing trips and hours spent in the fishing grounds due early occurrence of northeasterly winds caused the decline of fish catch.  

Major species which contributed to the total output of the province include skipjack, roundscad, and yellowfin tuna.