Q:

What is a swim bladder?

A:

Quick Answer

A swim bladder is an oxygen-filled organ found in most fish, although it is not found in sharks and lampreys. It helps the fish stay buoyant. In some species it's used to produce sounds.

Continue Reading
What is a swim bladder?
Credit: Nikita Flickr CC-BY-2.0

Full Answer

A swim bladder is often found in the dorsal or upper part of the fish, right above the digestive organs. It's usually made up of two sacs that can expand or contract in response to pressure. Some types of fish can adjust the pressure by gulping air. In other kinds of fish, the gas in the swim bladder is adjusted by the levels of carbon dioxide and acidity in the fish's blood.

Learn more about Zoology

Related Questions

  • Q:

    What are some types of fish?

    A:

    Some types of fish are sharks, rays, lampreys, catfish, lungfish, herring, tuna, pufferfish, coelecanth and gobies. Other types include angelfish, tetras, gouramis, cichlids, guppies and goldfish. Each of these refer to general types of fish, and each type may include many distinct species or varieties.

    Full Answer >
    Filed Under:
  • Q:

    Where is urine located in the bladder?

    A:

    Urine is stored in an elastic, hollow organ called the urinary bladder. The kidneys produce urine, which passes into the urinary bladder where it is stored until disposal via urination.

    Full Answer >
    Filed Under:
  • Q:

    What are the enemies of great white sharks?

    A:

    Humans are the greatest enemies of great white sharks. Great white sharks are among the millions of sharks that each year get tangled in fishing nets, discarded by fishing vessels as bycatch or have their fins cut off for shark fin soup.

    Full Answer >
    Filed Under:
  • Q:

    How many species of sharks are there?

    A:

    There are over 400 species of sharks currently prowling the world's oceans. The smallest shark is the dwarf lantern shark, which has a maximum length of 6.8 inches at maturity. The largest shark is the whale shark, which can reach a length of approximately 40 feet at maturity.

    Full Answer >
    Filed Under:

Explore