California-based distributor and sales agent Gravitas Ventures has signed on to handle international sales for the NFB eco-documentary Bluefin.

Written and directed John Hopkins, who also produces through his Prince Edward Island-based Square Deal Productions Atlantic banner, Bluefin brings together the perspective of fisherman and scientists to explore the sudden abundance of giant bluefin after years of low numbers due to overfishing.

Gravitas is handling sales in all international territories except Canada, where the NFB is distributing directly.

The doc was also nominated for the best feature documentary prize at the festival Raindance, which takes places from Sept. 20 to Oct. 1 in the U.K.

Bluefin has screened at a number of international festivals including Santa Barbara International Film Festival, Busan Sea and See Festival, San Francisco International Ocean Festival and Nova Scotia fest Lunenburg DocFest, where Hopkins won the Best Atlantic Filmmaker prize.