Two Unrelated Discussions

[Toadfish]

First, I wanted to know what people thought about cross-breeding corys, which could and would and do naturally cross-breed in the wild traveling together with sometimes a dozen different species all live and breeding together.

And second is how the heck do you tell the difference between C. trillineatus and C. julii? there identical as far as I can tell and i looked pretty closely, i can't seem to find a distinguishing feature.

 

[jarmado]

i think the julii has a black patch on its top fin??

 

[geo7x]

no, from the cory book it shows a pic of each and they both have spots. My book says:

The julii catfish is often confused with the false julii (c.trilineatus). The true julii is less robust in appearance, slightly slender and generally has a more finely spotted head.

 

[Toadfish]

well i guess that clears it up a little but then with the thinner part it could get confusing with males and females of the species looking like the other species. But I plan on checking out the spotted head thing at my LFS (also my work) because we had a few unamed tank of cories and based on what we ordered in I think I mixed trillineatus and julii together [but most people wouldn't care anyways, they just care about how it looks and whether it will clean their tank].

 

[geo7x]

here are pics from my book, when they are compared it is quite easy to distinguish.

this is the trilineatus, note that the markings are more lines than dots.

this is the julii corydoras. note the markings are more dotty than liney, and it is more of a slender, more elegant shape.

hope it helps

edit: sorry that the pics are on their sides, i could only fit the book in the scanner sideways, and i didnt get round to rotating them.

 

[Captain Retardo]

C. Trilineatus have longer lines and their pattern of dots on their head is reticulated, C. Julii has a shorter line and its spots on its head are just spots as you can see in the above posts picture