Do fish have lungs?

Discussion in 'More Freshwater Aquarium Topics' started by josh40996, Mar 16, 2012.

  1. josh40996

    josh40996Valued MemberMember

    At school we are having the disagreement between me and the whole of my biology class. I say fish DO NOT have lungs and have gills instead that extract oxygen from the water by passing oxygenated water over a membrane while everyone else including 2 BIOLOGY teachers (however my chemistry teacher also says the same as me) say that fish DO HAVE lungs and have to go to the air to breath oxygen. I mean im being deadly serious and im beginning to feel incredibly stupid. Please settle this ridiculous argument. Lol thanks

    If im correct i think my biology teachers need to go back to school and i have no idea how they got into teaching...
  2. e_watson09

    e_watson09Well Known MemberMember

    Hope this helps....

  3. OP

    josh40996Valued MemberMember

    Lol thanks iv already tried the yahoo answers approch but apparently "everyone over there is uneducated" and wont accept it

  4. e_watson09

    e_watson09Well Known MemberMember


    Second to last section on that website explains how fish breathe.
  5. bettanewbie

    bettanewbieValued MemberMember

  6. CichlidnutFishlore VIPMember

    If every fish needed to come to the surface for air, there would be no deep sea fish at all! How the heck could anything survive on the ocean floor? lol
  7. soltarianknight

    soltarianknightFishlore VIPMember

    -__- guess what YOUR BOTH WRITE, your teachers less so but still.

    Some fish have lungs called labrynth organs, Most gourami, all bettas and a huge variety of others have them, then you have fish like loaches and some catfish that abosrbe oxygen through their digestive tract by swallowing air. There are many ways that fish breath. However, betta for example can and will drown if they dont get any atmospheric air.
  8. sirdarksol

    sirdarksolFishlore LegendMember

    Standard fish do not have lungs. Gas exchange between blood and water occurs within the gills.

    Lungfish have true lungs, and only one species can actual breathe through its gills. I have a feeling that these are the fish to which your biology teachers are referring. I'm guessing that someone, somewhere missed that they were specifically referring to lungfish, and that's how this argument started.

    Anabantoids have labyrinth organs, which function like lungs. They can breathe through their gills, but they also need to breathe through the labyrinth organ periodically.
  9. gremlin

    gremlinWell Known MemberMember

    You could always offer to go fishing and catch a trout or bass - then dissect it in class and have the teacher show you where the lungs are.....or aren't.
  10. soltarianknight

    soltarianknightFishlore VIPMember

    ^ this or, so long as nobody opposes this, and please dont kill me. Go down to the LFS or Petcosmart and ask for some of their recently deseased guppys, feeders and the like, ask for 1 dead betta(their almost garunteed to have one) or gourami. Then disect away. They shouldnt have any problems giving up the dead fish if you explain the situation. Just be sure to freeze em. There are also whole fish you can buy at grocery stores and bait fish at bait shops.

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Dismiss Notice