The 39-year-old actor's philanthropic organisation donated USD 3 million to Oceana for conservation of ocean habitat and marine species, said The Hollywood Reporter.
"Protecting our planet's oceans and the marine species that call it home is one of the most pressing sustainability crises facing humanity today," DiCaprio said in a statement.
The actor's foundation dedicates itself to protecting the earth and since 1998 has worked on pressing environmental and humanitarian issues.