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Concept
Rhinopias
Summary
Rhinopias is a genus of marine ray-finned fish belonging to the family Scorpaenidae, the scorpionfishes. The species in this genus are found in the Indian and Pacific oceans.
Rhinopiaswas described as a genus in 1905 by the American ichthyologist Theodore Gill, Gill described it as a monotypic genus and designated Scorpaena frondosa as its type species. Scorpaena frondosa had originally been described in 1893 by the German-born British zoologist Albert Günther with its type locality given as Mauritius. The genus name is a combination of rhino meaning "snout" and op meaning "eye", an allusion to he upturned snout and raised orbits of R. frondosa with the suffix ias which is used in some Greek names for fishes, for example Xiphias.
There are six recognized species in this genus
There is some doubt as to whether R. eschmeyeri is a synonym of R. frondosa, with the two possibly being different sexes of a sexually dimorphic single species.
Rhinopias scorpionfishes are distinguished by having 12 spines i their dorsal fins and 3 spines in their anal fins. Their pectoral fins contain 12-18 fin rays with the lower rays being thickened. The soft fin rays of the dorsal and anal fins, as well as the upper fin rays of the pectoral fins, are branched. In adults the head and body are highly compressed with the width of the head being less than that of the body. The body is also very deep, the depth being 38-54% of its standard length. The body has a covering of small cycloid scales. There are teeth on the palatine and there are no interorbital ridges or tympanic spines but they do have upper post-temporal spines. These scorpionfishes vary in size from a maximum recorded total length of in R. xenops to in R. aphanes .
Rhinopias scorpionfishes have an Indo-Pacific distribution from the coast of eastern Africa to Hawaii and Easter Island. They are demersal fish, found in habitats with soft substrate and strong currents. They can occur in shallow waters down to around .
Official source
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