The company's April-June operational earnings before interest and tax (EBIT) dropped to 339 million Danish crowns (41.56 million pounds) from 408 million crowns in the previous year.
Analysts in a Refinitiv poll had forecast April-June operational EBIT to come in at 309 million crowns.
The price of farmed salmon was 9% lower in the second quarter than a year earlier, while its output fell by 2%, Bakkafrost said.
The salmon farming industry's global production will likely grow less than previously expected, supporting a good outlook for the company's fish farms, the company added.
The company, based in the Faroe Islands, is the first in a series of Oslo-listed fish farmers to report its second-quarter earnings this week, with market leader Mowi and others to follow in the coming days.
While Bakkafrost maintained its own full-year target of producing 54,500 tonnes of fish, the company now believes the industry's global growth will be in a range of 5%-6% in 2019 from 2018, while its previous forecast stood at 5%-7%.
The year-on-year growth in the third quarter will likely be around 5%, down from 8% in the second, Bakkafrost added.
Bakkafrost in June said it expects its fish harvest to surge by about 40% between 2019 and 2023. The company's shares are up 23% year-to-date and have doubled in value since mid-2017.
(Reporting by Terje Solsvik, Editing by Sherry Jacob-Phillips)