Kendrick Lamar performs “Freedom” with Beyonce (L) at the 2016 BET Awards in Los Angeles, California, U.S., June 26, 2016. (Photo by Danny Moloshok/Reuters)

Alexis Ren seen at Focus Features Los Angeles Special Screening of “Nocturnal Animals” at Hammer Museum on Friday, November 11, 2016, in Los Angeles. (Photo by Eric Charbonneau/Invision for Focus Features/AP Images)

MMVA host model Gigi Hadid takes pictures with fans as she arrives for the iHeartRadio Much Music Video Awards (MMVAs) in Toronto, Ontario, Canada June 19, 2016. (Photo by Peter Power/Reuters)

American singer Tinashe Jorgensen Kachingwe, known mononymously as Tinashe attends the 2021 MTV Video Music Awards at Barclays Center on September 12, 2021 in the Brooklyn borough of New York City. (Photo by Andrew Kelly/Reuters)

Gal Gadot is all excited while arriving at the Revlon event in New York City on January 24, 2018. Gal wore a plunging black gown with sheer skirt. (Photo by Felipe Ramales/Splash News and Pictures)

Chinese-American actress Bai Ling attends “The Key” screening at The Real Experimental Film Festival at Laemmle's Music Hall on November 21, 2014 in Beverly Hills, California. (Photo by Barry King/WireImage)

Greyhounds with stuffed and sprung model monkeys strapped to their backs before a hurdle race at Wellinborough. (Photo by E. Bacon). 21st April 1928

The photo project was done for the organization Fishlove and included some other U.K.-based celebrities posing in the buff with critters ranging from bass fish to sharks. Its goal is to raise awareness of how overfishing is destroying the oceans. The release of Gillian's nearly nude pic, which was snapped by French portrait photographer Denis Rouvre, is timed with a European Parliament vote on banning destructive forms of deep-sea fishing in the Northeast Atlantic. The Fishlove organization is trying to rally voters to sign a petition ending deep-sea trawling – which, according to scientists, is negatively impacting the fish population and their habits – and Gillian solicited signatures in a Twitter post. Photo: “Fish Love” Project by Photographer Denis Rouvre. Gillian Anderson. (Photo by Denis Rouvre)