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What color are Corydoras aeneus eggs when they`re fertile? Hubbie said he saw them laying the eggs but didn`t know about forming a T. He`s just learning about fish after not being interested for so many years.

MaryPa,
There's an informative posting at the top of this section (South American Catfishes,Callichthyidae-Corys et al) called "Hatching and Raising fry." It might answer your questions about Aeneus eggs. If not, please feel free to ask away! The "T" position is quite interesting. Someone more knowledgable than me could possibly point you in towards an article or posting about this.
Thanks,
Amanda

ps.Congrats on the eggs.

if after a few hours they go white then they are infertile. They should be a creamy/tranparent sort of colour. as they mature, they will become darker looking.

Hope you got some good ones and they should have hatched by now

The classic T formation is a prominent part of commonly breed Corydoras such as C.aneus and C. paleatus. If you watching in their spawning fenzy you will witness it repetitively. Some other species do the T formation but more subtly such as Corydoras sterbai yet they still do it.
You will be able to witness it if you are their to see them in the prspawn and spawning frenzy. Your Corys will spawn agai and again so there will be many opportunities in the future to watch the whole process. If you feed live worms to your Corys they will spawn more readily and frequently.
As with most fish a special breeding setup spawning tank will provide better conditions for breeding. I thoroughly clean all items going into the tank and the tank itself so I can eliminate all snails and their eggs from possible eating of the eggs. So reports claim that common pond snails, Physa species won't eat the fertile eggs but I don't trust them to behave themselves. Adding plants may reintroduce snails or their eggs so I leave out the live plants and any bottom substate that may introduce snails. A futher advantage of a barebottom tank is that live worms can't escape into the substrate where most will avoid being eaten. I maintain a shallow dish to place live blackworms in where the Corys can eat the worms at their leisure. I also used a disinfected large sponge filter driven by a small powerhead as most Corydoras appreciate a good current and the sponge filter don't trap the live worms or frozen bloodworms where in other filter types the foods may contribute to water pollution. This described method is what I use for commercial production. If you only wish to raise a few babies you can remove the Cory eggs with a razor blade and a turkey baster and place them in a fine mesh breeder box hung in the spawning tank which may be a community tank for hatching and initial rearing of the fry but for a time until the fry are larger. Later they will need their own aquarium to grow out to a size that will allow them to be returned to your community tank safely.

Aha now I know why my Pandas stopped spawning after being moved from the river tank. They loved the current. Thanks for the reply Larry,looks like some changes are in store for the cories I want to breed.

Mary,
I'm very good at dispensing advice but I will feel better when I can get my own pandas to spawn. I tip my hat to your success with your pandas. I have about 12 that are big enough to breed but so far success has eluded me. I'm doing well with sterbai and I have raised Reg, and albino aeneus as well as plaleatus.
I went on a buying spree recently and aquired Corydoras duplicarious, C-121(bugessi II), erhardti, hastatatus and habrosus. After I sell a batch of turquoise discus I think I'm going to order 8 Corydoraas weitzmanni. They are $24 each which is actually a pretty good price. The best source I have found for healthy Corys is a place in Florida called http://www.corysrus.com. They actually only sell well conditioned healthy Corys. I will wait until after the holiday madness is over. I wish you more success with your Corys.
Larry