Which type of Cory ? - Tropical Fish Keeping - Aquarium fish care and resources
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post #1 of 4 Old 09-13-2009, 06:59 PM Thread Starter
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Which type of Cory ?

Hi I'm trying to figure out which type of black spotted cory I have. Leopard, 3-line, Juli ? Or another lol
The other one was at least sold to me as an Emerald Green. If you think it's not lemme know :)
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post #2 of 4 Old 09-13-2009, 07:13 PM
looks exactly like a leopard cory cat.
seen here
Leopard Cory Cat - Corydoras julii & trilineatus

Vancouver, B.C. Canada
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post #3 of 4 Old 09-13-2009, 09:20 PM Thread Starter
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Leopard was my best guess from looking at lots of pictures, but there is certainly a good amount of variation and I wanted some more experienced eyes to look :) Thanks
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post #4 of 4 Old 09-14-2009, 02:20 PM
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Common names are often confusing, moreso with the spotted corydoras. I believe the fish you have is Corydoras trilineatus; here's a good site with photos and info. Corydoras trilineatus • Callichthyidae • Cat-eLog • PlanetCatfish

You will note it has a word on the differentiation between C. trilineatus and C. julii. And C. leopardus is another species similar in pattern.

Your green cory is I think Brochis splendens, not a true cory but a closely related genus with only three species. However, it has been suggested by some ichthyologists that the Brochis species be combined with certain of the larger Corydoras species into a new sub-genus, but I don't think this has yet occurred. Anyway, a closer photo would help, but the dorsal fin on your fish seems to be that of a Brochis; an external difference between Brochis species and Corydoras species is that Brochis has 10 or more rays in the dorsal [Brochis splendens is the only one of the three with 10-12 rays, the other two species have more than 12], while the Corydoras species all have seven rays. This makes the dorsal fin longer, more sail-like, which is what appears to be the case in your photos. Photo of B. splendens is attached [top photo], along with photo of C. anaeus (the true green cory) for comparison; it is easy to count the rays in both these photos.

B. splendens will get larger (just over 3 inches max length) than most Corydoras (2 inches is common for most species), so bear that in mind if you are thinking of adding to the number. And there should be a few more, since all species in both genera, along with the also closely-related Aspidoras genus, are shoaling fish that live in very large groups in the wild and feel much more "safe" when maintained in groups of 5 or more in aquaria.

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File Type: jpg Corydoras aeneus.jpg (44.1 KB, 25 views)

Byron Hosking, BMus, MA
Vancouver, BC, Canada

The aquarist is one who must learn the ways of the biologist, the chemist, and the veterinarian. [unknown source]

Something we all need to remember: The fish you've acquired was quite happy not being owned by you, minding its own business. If you’re going to take it under your wing then you’re responsible for it. Every aspect of its life is under your control, from water quality and temperature to swimming space. [Nathan Hill in PFK]
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