Fish—which is loaded with protein, vitamin D and omega-3 fatty acids—is among the healthiest foods on the planet, and that's not to mention that dining on fish has a smaller carbon footprint than red meat, pork and chicken.

But here's the catch: the world's increasing appetite for finned food has led to a devastating problem with nearly 90 percent of global fish stocks either fully fished or overfished, according a 2016 analysis from the United Nations Food and Agriculture Organization. Meanwhile, the Organization for Economic Co-operation and Development forecasts a 17 percent rise in fish production by 2025.

In addition to depleting fish stocks, the long term sustainability of the ocean's resources is also threatened by acidification, warming waters, hypoxia, sea level rise, pollution and the overuse of marine resources.

That's why Oscar-winning actor and environmental activist Leonardo DiCaprio has gotten behind Boulder, Colorado-based seafood brand LoveTheWild that sells frozen seafood kits made with 100 percent farm-raised fish.

"Estimates show the earth's population approaching nine billion by 2050, putting tremendous pressure on our natural food resources," DiCaprio said in a statement. "Seafood is a primary source of protein for nearly a billion people—but climate change, acidification and over fishing are putting increased pressure on our oceans' natural stability."

"LoveTheWild's approach to sustainable, responsible aquaculture is promoting the development of a secure and environmentally-conscious solution to feeding our planet's growing population," he added.

The Before the Flood filmmaker has made an investment in the brand and will also serve as an advisor. According to BizWest, DiCaprio and sustainable aquaculture investment fund Aqua-Spark round out a $3 million Series A funding announced in February, in which Aqua-Spark invested $2.5 million.

"The exploitation of our oceans has left many marine ecosystems on the brink of total collapse, which is hurting our ability to harvest our seas as a reliable food source as we have for thousands of years," DiCaprio continued. "LoveTheWild is empowering people to take action on this crisis in a very meaningful way."

Farmed seafood, or aquaculture, currently provides roughly half of all fish consumed globally. Experts tout it as a way to supply protein, nutrition and food security to a rapidly growing global population.

However, aquaculture operators in some countries, such as Chile's salmon industry, have been criticized for crowding fish into tight enclosures that breed disease and raising them on unnatural diets and antibiotics.

But as Tim Fitzgerald, a scientist and sustainable seafood expert at the Environmental Defense Fund, told the New York Times, farming practices are improving and some merchants set high standards for the fish they sell.

LoveTheWild, founded by Jacqueline Claudia and Christy Brouker in 2014, sells sustainable fish that's good for you and the oceans at the same time. The company said it selects its seafood from the "most well-managed farms in the world."

The line includes striped bass with roasted pepper almond sauce, barramundi with mango Sriracha chutney, catfish with Cajun creme and red trout with salsa verde. The kits are in retailers such as Whole Foods Market, Wegmans, Sprouts and Mom's.

"Our vision for LoveTheWild was inspired by our dedication to aquaculture, and we're very humbled that the quality of our products and integrity of our vision has attracted such a powerful group of supporters and investors," said Claudia, LoveTheWild CEO, in a statement.

"We are excited that Mr. DiCaprio, someone so dedicated to environmental activism, has partnered with LoveTheWild to help make it easy for consumers make an impact on the environment through something as simple as choosing the right thing for dinner. We have no doubt that the involvement of all of our investors will further bring to life our mission of making high-quality seafood exciting, easy, and accessible, while also helping to bring awareness to the potential for responsible aquaculture to play an important role in our food future."

DiCaprio, and his Leonardo DiCaprio Foundation, has long put his philanthropic dollars towards environmental organizations and businesses that protect oceans, land and wildlife, as well as operations that work to fight against climate change.

Last year, the foundation awarded a total of $15.6 million in grants, including $7,631,508 for wildlife and habitat conservation; $2,525,000 for ocean conservation; $2,100,000 to protect indigenous rights; $2,085,000 to support innovative solutions to the world's problems; and $1,300,000 to combat climate change. With these grants, the Leonardo DiCaprio Foundation has provided more than $59 million in support of many projects since 1998.