4-431: Gibberichthyidae Hispidoberycidae Melamphaidae Stephanoberycidae The Stephanoberyciformes are an order of marine ray-finned fishes , consisting of about 68 species, the majority (61) of which belong to the ridgehead family (Melamphaidae). The Stephanoberyciformes are mostly uncommon deep-sea species with little, if any, importance to commercial fishery . They share many morphological similarities with
8-568: The Beryciformes , their sister order. Some sources classify their other close relatives, the whalefishes , as a superfamily herein, named Cetomimoidea. Most taxa traditionally placed here would then be the Stephanoberyciodea . The families are: Common characteristics include; a generally rounded body, a toothless palate , rather thin skull bones, and a missing orbitosphenoid bone (except for Hispidoberyx ). The gibberfishes on
12-661: The velvet whalefish , Barbourisia rufa . Gibberichthyidae The Gibberichthyidae , also known as gibberfishes , are a small family of deep sea beryciform ray-finned fish , containing a single genus , Gibberichthys (from the Latin gibba , "humpbacked" and the Greek ichthys , "fish"), and two species . Found in the tropical western Atlantic , western Indian , and western and southwestern Pacific Oceans at depths of about 400–1,000 m, gibberfishes are of no economic importance. The maximum recorded size for either species
16-400: The other hand appear to be closer to whalefishes such as Rondeletia , as has been proposed time and again. These two groups have - apparently as only living fishes - the mysterious Tominaga's organ (A large mass of globular white tissue, that is present anterior to the orbit and posterior and medial to the nostrils and nasal rosette). Rondeletia , meanwhile, is suspected to be very close to
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