Here is a collection of photographs Hauser took during a 4 year period of expeditions with Pelagic Life, an NGO whose purpose is the protection of the Mexican open ocean through eco-tourism and the use of high quality images. Hauser took these photos while freediving in the open ocean, mostly in Mexico.
Hauser reports that he came up empty many times, spending hours in rustic fishing boats in an effort to catch pictures of the elusive open ocean sea life. It is all worth it, he says, when something rare like a smooth hammerhead comes along and poses just perfectly for you. According to Hauser, that makes it all worthwhile.