Save The Sharks!

Leonardo DiCaprio, along with fellow advocates Scarlett Johansson, Megan Fox, and Ke$ha, among others, have teamed up with WildAid, the Natural Resources Defense Council and the Humane Society of the United States to bring attention to dwindling shark populations worldwide.

The foursome and a slew of others have written a letter to the California State Senate supporting Assembly Bill 376, which would ban the sale of shark fins in California.

“The International Union for the Conservation of Nature has concluded that a third of shark species are now threatened with extinction of some kind,” Leo, Scarlett, Megan, Kesha, and others celebrity advocates said in a letter to congress.

Leo further stated, “Despite fisheries attempts at regulation, the inhumane practice of finning continues unabated too, as does the illegal capture of sharks from marine reserves and sovereign waters.”

Others involved in the cause include Alexander Skarsgard, Rachel Bilson, Ian Somerhalder, Ben Stiller, and more.