Preservation Obscures Pelagic Deep-Sea Fish Diversity: Doubling the Number of Sole-Bearing Opisthoproctids and Resurrection of the Genus Monacoa (Opisthoproctidae, Argentiniformes)
Fig 2
Illustrations of the “sole” and hyaloid body (reflector) found in species of the genus Monacoa (A–B). A, The sole—a large flattened structure covered with large pigmented scales. B, Light organ and hyaloid body (reflector), controlling bioluminescence. Bioluminescence is produced in the large black light organ, a modification of the distal intestinal tract, situated above the anal opening. Modified for Monacoa after Bertelsen & Munk [12].