Answer:
Bony fishes have an endoskeleton of bones. Their body is
covered with cycloid, rhomboid (ganoid) and ctenoid scales. They provide
greater flexibility to the body.
They possess four pairs of gills. Gills are covered by operculum.
An air bladder is present. It helps in maintaining buoyancy. It is symmetrical
or homocercal.
A separate opening for elimination of faecal matter called anus is
present. Labeo rohita (rohu), Catia catia (catia), Gambusia (mosquito fish), Exocoetus
(flying fish). Hippocampus.
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