| | Barreleye -- Facts, Info, and Encyclopedia article (Site not responding. Last check: 2007-10-19) |
 | | The (Studies of the rules for forming admissible words) morphology of the Opisthoproctidae varies between three main forms: the stout, deep-bodied barreleyes of the genera Opisthoproctus and Macropinna; the extremely slender and elongate spookfishes of the genera Dolichopteryx and Bathylychnops; and the intermediate fusiform spookfishes of the genera Rhynchohyalus and Winteria. |
 | | Barreleyes inhabit moderate depths, from the (additional info and facts about mesopelagic) mesopelagic to bathypelagic zone, ca. |
 | | They are presumably solitary and do not undergo (additional info and facts about diel) diel vertical migrations; instead, barreleyes remain just below the limit of light penetration and use their sensitive, upward-pointing tubular eyes—adapted for enhanced (Vision involving the use of both eyes) binocular vision at the expense of lateral vision—to survey the waters above. |
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