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I bought this Ancistrus with a couple of A. Claro, it was the biggest of all, but now after 3 month its hasn't grow very much, i think it isn't a A. Claro, it looks different, i hope somebody can see it clearly

The seller said it was a A. Claro but this one was much bigger then the rest of the Claro.

I would agree that it doesn't look like A. claro. Unfortunately, brown with light spots is a very commmon pattern, so without further information, it's hard to say for sure. A. claro has a pretty distinctive shape of their mouth (more oval - broader than it is "long", where MOST Ancistrus species have a fairly round or square shape mouth).

A. claro:


Common bristlenose:


--
Mats

I'm going to catch him again and take a picture from the mouth tonight, i will upload the photo then.

I've just had some mail contact with OP (for some reason if you search for A. Claro on any dutch forum you tend to notice my name. ). Seems the bigger fish also has spots on it's belly. My claros are silvery on their bellies. Now I know that colour doesn't say much with ancistrus but in this case it might be a clue.

yes jeroen i notice that you are famous in Holland ;). Before i first contacted you i already noticed that you and your little friends are everywhere.

you are right about the belly, this Claro on my picture has spots on her belly, my other young Claro has also a silvery belly as yours.

is this the conclusion dat this issen't a A. Claro.
if I have the opportunity I will try to make a photo.

good night to you, Walter

I'm not that sure a photo of the mouth will be much help - unless you find it hard to tell if it's "oval" or "round", that is.

--
Mats

I finally have taken some good pictures and it explains a lot, see below, conclusion is that this issen't a A. Claro.
What Ancistrus is it then???


No Claro:

Ancistrus Claro ??? by walter-van-der-touw, on Flickr

Real Claro:

Young Ancistrus Claro by walter-van-der-touw, on Flickr

No Claro:

Ancistrus Claro ??? by walter-van-der-touw, on Flickr

Real Claro:

ancistrus young Claro by walter-van-der-touw, on Flickr