The World’s Smallest Fish

They are small, they are tiny, they are fish, and they are weird. The World’s smallest fish are the Paedocypris progenetica of the carp family which measure less than 8mm in size and live in swamps with a pH of 3.

They measure 7.9mm

They are small, they are rare and they are weird! Imagine fish that measure less than a centimeter, 7.9 millimeters to be exact. They are the smallest fish in the world and inhabit acidic water with a PH of 3, 100 times more acidic than rain water. They have grasping fins and dwell in threatened swamps.

They were discovered in 2006 in Sumatra, Indonesia

Scientists discovered these tiny fish in 2006 in forest swamps on the Indonesian island of Sumatra. They belong to the carp family and have been named Paedocypris progenetica. Several populations of these tiny fish have already been lost due to forest fires that decimated their habitats.

They have a reduced head skeleton with larvae like appearance

The fish are tiny see through vertebrates that have a larvae appearance and a reduced head skeleton leaving their brains without bone protection. Aside from being the world’s smallest fish, the Paedocypris progenetica holds the record for being the world’s smallest vertebrate after eclipsing the previous record of 8mm held by an Indo pacific goby.

Discovered by ichthyologists

The fish were discovered by fish experts Maurice Kottelat from Switzerland and Tan Heok Hui from the Raffles Museum of Biodiversity Research in Singapore. They were working with their colleagues from Indonesia and with Kai-Erik Witte from the Max Planck Institute in Germany.

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33 Responses to “The World’s Smallest Fish”
  1. Raj the Tora Says...

    On April 22, 2011 at 3:17 pm

    so cute they are. Thanks for information on them. :)


  2. lolontka Says...

    On April 22, 2011 at 3:24 pm

    Interesting tiny fish.


  3. Jakkalsdans Says...

    On April 22, 2011 at 3:26 pm

    Very interesting.


  4. sanataryal Says...

    On April 22, 2011 at 3:27 pm

    Tiny creature,tiny life…great article.


  5. Val Mills Says...

    On April 22, 2011 at 3:31 pm

    fascinating to learn new information.


  6. Squirty Says...

    On April 22, 2011 at 3:33 pm

    That is just astonishing! I really enjoy these curious articles, thank you for sharing!


  7. Aiyanna Says...

    On April 22, 2011 at 3:34 pm

    Nice one!!! Glad to see you writing something different finally…. :)


  8. prasul Says...

    On April 22, 2011 at 3:51 pm

    wow, this is new!


  9. SharifaMcFarlane Says...

    On April 22, 2011 at 5:10 pm

    They are tiny.


  10. serowa Says...

    On April 22, 2011 at 6:51 pm

    Are they smaller than sardines?


  11. CA Johnson Says...

    On April 22, 2011 at 6:59 pm

    I have never seen a fish that small. That is really amazing.


  12. silentbob14 Says...

    On April 22, 2011 at 7:53 pm

    Well this shows how imaginative nature can be ;) Great post


  13. Erin Miller Says...

    On April 22, 2011 at 9:40 pm

    Wow that is some pretty interesting stuff right there.


  14. LCM Linda Says...

    On April 22, 2011 at 11:06 pm

    Interesting to know about. Trust they live in the bodies of many big fish.


  15. fagina Says...

    On April 23, 2011 at 12:03 am

    Wow! That’s really cute and tiny.. But why did they have to give this tiny fish such a big name?!


  16. Brenda Nelson Says...

    On April 23, 2011 at 12:05 am

    my father knows all about this fish – he is an Ichthyologist too


  17. researchanalyst Says...

    On April 23, 2011 at 12:20 am

    These tiny fish are amazing, this is such a great discovery, thanks for sharing.


  18. LoveDoctor Says...

    On April 23, 2011 at 12:49 am

    Wow! They are very small. This is a wealth of information. A very good write.


  19. Anuradha Ramkumar Says...

    On April 23, 2011 at 1:42 am

    Too small. Wow…interesting.


  20. Melody SJAL Says...

    On April 23, 2011 at 3:17 am

    Very small indeed.


  21. Starpisces Says...

    On April 23, 2011 at 12:45 pm

    learn something here, thanks, so this is the smallest fish, I always thought the smallest fish is Ikan Bilis..


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    On April 23, 2011 at 3:55 pm

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  23. Lerinti Sorin Says...

    On April 23, 2011 at 7:22 pm

    interesting.


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  25. papaleng Says...

    On April 24, 2011 at 12:55 am

    I thought we hold the record for the smallest fish in the world.. We call them Tabios.


  26. ittech Says...

    On April 24, 2011 at 6:58 am

    thanks amazing

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  27. Karlo Majer Says...

    On April 24, 2011 at 10:57 am

    Interesting. I never tought something this small lives in the sea world. Great article Jimmy!


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    On April 24, 2011 at 4:37 pm

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  29. fl0rencia Says...

    On April 24, 2011 at 8:54 pm

    I thought the smallest fish in the world is called pandaca pigmea.


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  31. Cen Sin Says...

    On April 26, 2011 at 8:36 pm

    I think it is the same family with guppy fish, but has smaller form.


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    On April 29, 2011 at 9:28 am

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    On April 29, 2011 at 9:31 am

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