"PAR" FOR THE...
'Some species of <a href="http://www.j-archive.com/media/2008-12-31_DJ_02.jpg" target="_blank">this</a> birdlike fish secrete a <a href="http://www.j-archive.com/media/2008-12-31_DJ_02a.jpg" target="_blank">mucus sac</a> around their bodies at night for shelter'
a parrotfish