PlanetCatfish.com

Hello that´s the cuestion How Can I identify between Ancistrus dolichopterus Vs Ancistrus temminckii. ... You know..????

Thanks...

<i>Ancistrus dolichopterus</i> is generally much darker in color, and has more dorsal-fin rays (9 vs. 8). It's also supposed to have a markedly longer lobe of the caudal fin.

Thanks.. well....mmm but.. When I going to buy some ones.. How Can I know.. Which .. is which.. for example .. fishbase.org.. have this images:



http://www.fishbase.org/Summary/Species ... ichopterus

And this have just 8 dorsal- fin rais.. but the next It have 9 and is :

http://www.fishbase.org/Summary/Species ... temminckii

Your image:


Or It could be the same sp..???

Thanks..

It's next to impossible to tell which is which just by looking at color pattern alone, as several species of <i>Ancistrus</i> are known to have a spotted pattern like that.
Fin ray numbers are a lot less variable, and so is more reliably used to identify species.