The Worlds Smallest Fish - Paedocypris progenetica

Posted on the 29th November 2013

22019-460317890684220-1921506921-n.jpg&wThe world's smallest known fish is Paedocypris progenetica, having only been discovered in the last decade. Scientists found this fish species living in the forest swamps on the Indonesian island of Sumatra, with a mature female Paedocypris only measuring tiny 7.9 mm in length! In fact, only until recently, Paedocypris was the world's smallest known vertebrate or backboned animal, which has now been superseded by a minute frog (Paedophryne amauensis) from the New Guinean rain forests.

 

The fish, a member of the carp family, has a partially see-through body and a reduced head skeleton, which leaves the brain completely unprotected by bone. This tiny, translucent fish has the appearance of larvae, possesses some bizarre grasping pelvic fins and lives in dark tea-coloured waters with an acidity of pH3, which is at least 100 times more acidic than rainwater!

 

The Sumatran swamps were once thought to harbour very few animals, but research has revealed that they are highly diverse and home to many unique species that occur nowhere else. However, as with many such areas, this habitat is in much danger as the peat swamps have been damaged by large forest fires and they are still being threatened by industries such as logging and agriculture. As a result several populations of Paedocypris have already been lost.

 

The previous record for smallest fish was held by an 8 mm species of Indo Pacific goby. The UK's smallest fish is the marine Guillet's goby (Lebetus guilleti) reaching, in comparison, a whopping 24 mm in length!

 

Thank you for reading this week's edition of FIN ('Fascinating Ichthyological Nugget'): the easiest way to propel your aquatic knowledge! We sincerely hope that you'll find these of interest and want to share them with your friends…

Please note that we are not able to answer questions or reply to any comments via this section - for any advice or information please call or visit your local Maidenhead Aquatics store. The information contained in this website is for general information purposes only. The information is provided by Maidenhead Aquatics and while we endeavour to keep the information up to date and correct, we make no representations or warranties of any kind, express or implied, about the completeness, accuracy, reliability, suitability or availability with respect to the website or the information, products, services, or related graphics contained on the website for any purpose. Any reliance you place on such information is therefore strictly at your own risk.

Your Basket

Your basket is empty.