National Geographic : 1931 Mar
IRIDESCENT DENIZENS OF THE MINIATURE AQUARIUM © National Geographic Society Painting from lile by Hashine Murayama THE BRAZILIAN HALF-MOON AND THE PRISTELLA Because of its dignified bearing, the Brazilian half-moon (Plerophyl/um sca/are) is called the aristocrat among pygmies, and is included among the few fishes in which both parents protect their eggs and young. Prislellariddlei [at top], an inhabitant of British Guiana, Venezuela and the lower Amazon, is an active species in which the colors vary with the habitat from delicate opalescence to scarlet and gold. It is difficult to breed in captivity. The fishes reproduced in this and in succeeding color plates are natural size.