Two Ompoks or only one?

Jorge · Post by **Jorge** » 29 Sep 2004, 18:28

They came to my LFS. I don't know if they are two species mixed (I think could be O. eugeniatus top and maybe Ompok pabda down)

or are both the same? in this case O. pabda?

Any ideas?

Post by **Silurus** » 29 Sep 2004, 18:31

These are all .

Jorge · Post by **Jorge** » 29 Sep 2004, 18:44

Thanks....

How do you difference they?

another pic:

Post by **Silurus** » 29 Sep 2004, 18:46

You mean the difference between Kryptopterus and Ompok? Or among different species of Kryptopterus?

Jorge · Post by **Jorge** » 29 Sep 2004, 18:50

between Kryptopterus and Ompok... but if you want...

Post by **Silurus** » 29 Sep 2004, 19:05

The traditional method has been to look at the extent of the gape. If it extends to at least the front edge of the eye, it's an Ompok. If it does not, it's a Kryptopterus. The number of dorsal-fin rays has also been used: 4 - Ompok; less than 4 - Kryptopterus.

These methods do not provide clear-cut distinctions between the two, simply because what is now known as Kryptopterus and Ompok consist of more than two genera.

Jorge · Post by **Jorge** » 30 Sep 2004, 18:41

Thanks silurus

It seems to be difficult ... what about differences among Kryptopterus?

I suppose all of this are K. bicirrhis... or any is not?

Post by **Silurus** » 30 Sep 2004, 18:52

These are all .