June 27, 2007 00:39:25

Stylephorus chordatus, a “tube-eye” of the family Stylephoridae, is a
mesopelagic and bathypelagic species with eyes modified to detect the
slightest traces of light. This species feeds by sucking plankton (copepods) into its small mouth opening and up its long snout. It looks downward at a passing copepod, family Eucalanidae. This species makes
daily journeys through the water column, following the plankton it feeds upon, closer to the surface at night and deeper by day. It swims oriented straight up and down in the water column. This individual was captured in a trawl between 640 and 1000 meters depth.