The Pajama (Pyjama) cardinalfish (Sphaeramia nematoptera) is a species of fish belonging to the Apogonidae family. It is a popular aquarium fish. It grows to a total length of about 2.5 inches (8.5 centimeters) and features distinctive red eyes and a broad dark vertical ‘waistband’ with scattered red spots toward the tail. It is considered to be of low vulnerability, and is distributed throughout much of the West Pacific, from Java to Fiji, and from the Ryukyu Islands south to the Great Barrier Reef. In Pajama cardinalfish, males incubate the eggs in their mouth until they hatch.
(From Wikipedia, May 31st, 2012)