This paper went through a peer review process before being accepted to PeerJ.  The Peer review process was available on PeerJ for everyone to read. 
The process took about three months for the paper to be accepted.
It was first submitted on February 16 2015.  It was reviewed by two reviewers and the author was told to do major revisions before the paper would be accepted.  The revision was submitted on May 1 2015, and was reviewed by one reviewer and the academic editor.  This time the author was asked to make minor revisions.  The author made the minor revisions and was finally accepted on May 18 2015.

Information Credit: Sherman E.  2015.  Can sea urchins beat the heat? Sea urchins, thermal tolerance, and climate change.  [Cited November 16, 2015].  PeerJ 3:e1006  Available from: http://dx.doi.org/10.7717/peerj.1006

Photo Credit: Sea urchins enjoying sunbathing.  2007.  Wikimedia Commons.  Available from: https://commons.wikimedia.org/wiki/File:Sea_Urchins_enjoying_sunbathing.jpg