https://phys.org/news/2018-06-edna-analysisa-key-uncovering-rare.html

In the Science perspectives piece, Professor Pikitch explains how eDNA is being used to detect species presence and quantify the abundance of species. She compares the method head on with other techniques that are being used to study rare marine species, many of which are less sensitive, more labor-intensive, involve capture of animals and destruction of their habitat.

Professor Pikitch says that "eDNA outperforms traditional research methods used to study marine species in many respects. Given its advantages, eDNA is likely to quickly become the method of choice for detecting rare and elusive marine species."