Plectranthias alleniPlectranthias alleni, also known as Allen's perchlet, is a species of fish in the family Serranidae occurring in the eastern Indian Ocean.SizeThis species reaches a length of.EtymologyThe fish is named in honor of ichthyologist Gerald R. Allen, of the Western [Australia Museum] in Perth, who provided the type specimens to the author knowing that the species was an undescribed one.