Pearlsides
Encyclopedia
Mueller's pearlside or Mueller's bristle-mouth fish, Maurolicus muelleri, a marine hatchetfish
Marine hatchetfish
Marine hatchetfishes or deep-sea hatchetfishes are small deep-sea mesopelagic ray-finned fish of the stomiiform subfamily Sternoptychinae...

 of the genus Maurolicus
Maurolicus
Maurolicus is an oceanic ray-finned fish genus which belongs in the family Sternoptychidae. They are commonly known as pearlsides, but the brilliant pearlside is the related Argyripnus iridescens...

, is found in deep tropical and subtropical waters of all oceans, from the surface to depths of 1,500 m. Its length is between five and eight cm.
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