Q:

What are three characteristics of bony fish?

A:

Quick Answer

Three common characteristics of all bony fish are that they have a bone skeleton, externally fertilize their eggs and have bony platelike scales. Bony fish are also known as Osteichthyes, and cover a diverse group of fish of over 20,000 species.

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Full Answer

A key characteristic of these fish is their skeleton made of bones as opposed to cartilage. Bony fish can be broken into two key groups: lobe-finned fish and ray-finned fish. They can be found in freshwater and saltwater. Osteichthyes have a smooth mucus that covers their overlapping scales. Cartilaginous fish, like sharks, have a smooth skin as opposed to scales.

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Related Questions

  • Q:

    What do bony fish eat?

    A:

    The diet of a bony fish includes plankton, crustaceans, invertebrates and other fish, depending on the species. There are over 28,000 species of bony fish.

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  • Q:

    What are some interesting facts about the bony fish?

    A:

    The majority of fish in the world are classified as bony fish, including nearly all commercial and sport fishes. Bony fish are classified by their skeletons that are made, at least partially, of true bone rather than cartilage. Most bony fish also have a swim bladder, covered gill chambers, bony scales, external egg fertilization and a skull with sutures. Other fish, cartilaginous fish, have skeletons made from cartilage.

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  • Q:

    Do fish lay eggs?

    A:

    Some fish species are oviparous, meaning that the fish fry (babies) are born from eggs that are excreted from the female fish's body prior to hatching. Fish eggs are occasionally used by humans for food and fish bait.

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  • Q:

    What are some characteristics of fish?

    A:

    Fish live in the water and breathe by absorbing oxygen through their gills. Fish are cold-blooded animals, so their internal body temperature is influenced by the environment. Many fish have scales and use their fins to swim. Fish have a spine but do not have external ears or eyelids. Fish also have air bladders, which keep them afloat.

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