Polynemus - Current recognized Threadfin species

[Oddball]

Genus Polynemus

Polynemus aquilonaris - Demersal; freshwater; brackish

Polynemus bidentatus - Pelagic; freshwater

Polynemus dubius - Demersal; potamodromous; freshwater; brackish; marine

Polynemus hornadayi - Demersal; freshwater

Polynemus kapuasensis - Demersal; freshwater

Polynemus melanochir - Demersal; freshwater; brackish

Polynemus multifilis - Demersal; freshwater; brackish

Polynemus paradiseus - Demersal; amphidromous; freshwater; brackish; marine

Above is a list I've been holding onto for a couple of years. It was forgotten over time. I just received a new book for a little light reading. Thought I'd share a bit. Who knows, if there's enough interest in this family of fish, it may lead to increased importation. Most of these species are aquacultured as food fish overseas.


From:
Threadfins of the world
(Family Polynemidae)

An annotated and illustrated catalogue of
polynemid species known to date



Hiroyuki Motomura
Ichthyology, Australian Museum
Sydney
Australia

 

[Oddball]

Recently, there have only been 2 species available for aquaria in the US (that I've noted). These are; Polynemus multifilis and P. paradiseus.
The list of threadfin species is mindboggling. Makes me wonder why we haven't seen more availability of these fish in the hobby.

 

[Oddball]

A new species has been described by Hiroyuki Motomura of the Kagoshima University Museum and Shinji Tsukawaki of Kanazawa University in the latest issue of the journal the Raffles Bulletin of Zoology. The new species has been discovered in the Mekong River in Vietnam. It's been named Polynemus bidentatus.

Here's a pic of the specimen described from a 2006 collection:

 

[Oddball]

Cool pic of a threadfin specimen at the Guangzhou Aquarium:

 

[Oddball]

From clovegarden.com. A CA-based site dealing with market-available fish that are of culinary interest in CA cooking.

 

[Oddball]

Awesome display at the Chiangmai Zoo Aquarium:

 

[Oddball]

A shoal of these would look incredible in a roomy tank...

 

[Tom]

Beautiful pictures!

Thank you very much for sharing.

 

[Gr8KarmaSF]

One of my all time fav. fish!!!!

[YT]<object width="425" height="344"><param name="movie" value="http://www.youtube.com/v/3vztLctdBVA&hl=en&fs=1&"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/3vztLctdBVA&hl=en&fs=1&" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="425" height="344"></embed></object>[/YT]

 

[Piscineidiot]

Actually have a couple of people studying Eleutheronema tetradactylum and Polydactylus macrochir in the department I work in.

Any idea why the polynemids have a reputation of being hard to keep?

The Eleutheronema tetradactylum that we had here for growth studies didn't seem to be particularly hard to maintain - dopey and jumpy, but not apparently fussy. It was kept in marine water while it was with us.