Sphaeramia
Encyclopedia
Sphaeramia is a genus of Cardinalfish
Apogonidae
Cardinalfishes are a family, Apogonidae, of ray-finned fishes. They are found in the Atlantic, Indian, and Pacific oceans, they are chiefly marine, but some species are found in brackish water...

 of the family Apogonidae
Apogonidae
Cardinalfishes are a family, Apogonidae, of ray-finned fishes. They are found in the Atlantic, Indian, and Pacific oceans, they are chiefly marine, but some species are found in brackish water...

. They are marine fish that live in shallow tropical reefs
Coral reef
Coral reefs are underwater structures made from calcium carbonate secreted by corals. Coral reefs are colonies of tiny living animals found in marine waters that contain few nutrients. Most coral reefs are built from stony corals, which in turn consist of polyps that cluster in groups. The polyps...

. There are two species:
  • Pajama cardinalfish
    Pajama Cardinalfish
    The Pajama cardinalfish 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 and features distinctive red eyes and a broad dark vertical 'waistband' with scattered red spots toward the tail...

    , Sphaeramia nematoptera (Bleeker
    Pieter Bleeker
    Pieter Bleeker was a Dutch medical doctor and ichthyologist, famous for his work on the fishes of East Asia – Atlas Ichthyologique des Orientales Neerlandaises – which was published 1862–1877....

    , 1856)
    .
  • Orbiculate cardinalfish
    Orbiculate Cardinalfish
    The Orbiculate cardinalfish is a species of cardinalfish from the Apogonidae family. It grows to about 10 centimeters total length, and has a thin, dark vertical 'waistband' with scattered dark spots toward the tail...

    , Sphaeramia orbicularis (Cuvier
    Georges Cuvier
    Georges Chrétien Léopold Dagobert Cuvier or Jean Léopold Nicolas Frédéric Cuvier , known as Georges Cuvier, was a French naturalist and zoologist...

    , 1828)
    .

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