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Silurus wrote:http://www.planetcatfish.com/catelog/sp ... ies_id=599

All of them are 174?
They look different to it except pic no.3.
So what are the other two most likely to be?

Whilst I'm far from the expert that Silurus is, I'd say that they are probably all L174 - it's a fairly variable species, so as long as they have SIMILAR patterning and body shape, same mouth (which would be useful to have a shot of), I'd call them the same species.

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Mats

MatsP wrote:Whilst I'm far from the expert that Silurus is, I'd say that they are probably all L174 - it's a fairly variable species, so as long as they have SIMILAR patterning and body shape, same mouth (which would be useful to have a shot of), I'd call them the same species.

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Mats

No. 3 is most likely to be 174 as the dotted pattern matched.
However, the other two seems not quite the same...I know it's pretty much the same in shape and mouth size, but the different in pattern (i.e. dotted or lines, thick / thin lines) and the background colour (white / milky white / yellowish) may play an important role, is it?
From the pic I took may not be that clear to distinguish, however, they do have different background coloration. That is, the first one tends to be more white and the second one is more yellowish.

Um, one more thing that may help, no.1 is from the L-number 236, and no.2,3 are L-173.

Even L174 can have these kind of pattern even that yours look very similar to L287-L399-L400 but...their eyes seams to be to small to be these species. It's a little hard to tell from the pics but does all species have small eyes?
Pic 3 looks to have bigger eyes and if so it's L287-L399-L400 and pic 1 and 2 is L174, but better pics showing their heads in profile would help a lot.

Janne

Janne wrote:Even L174 can have these kind of pattern even that yours look very similar to L287-L399-L400 but...their eyes seams to be to small to be these species. It's a little hard to tell from the pics but does all species have small eyes?
Pic 3 looks to have bigger eyes and if so it's L287-L399-L400 and pic 1 and 2 is L174, but better pics showing their heads in profile would help a lot.

Janne

Thanks Janne, i try to take another pics of their heads next time.
Do their eyes play roles in distinguishing species to species? Like how?
Do you have any pic for reference?

Yes, the size of their eyes are equal in the same species but between different species it can either be bigger or smaller or equal, the colour can also be different between species. The proportian of their heads and body, high or low short or elongated also helps to distinguish different species that looks very similar. You can compare species in the Cat-eLog, compare for example L66 with L174 and you will see the differencies.

Janne