Sternoptychidae
The marine hatchetfishes or deep-sea hatchetfishes as well as the related bottlelights , pearlsides and constellationfishes are small deep-sea ray-finned fish of the stomiiform family Sternoptychidae . 
<triplet> marine hatchetfish <subj> Sternoptychidae <obj> parent taxon <triplet> pearlside <subj> Sternoptychidae <obj> parent taxon <triplet> stomiiform <subj> ray-finned fish <obj> parent taxon <triplet> Sternoptychidae <subj> stomiiform <obj> parent taxon