Corydoras Aeneus
The bronze corydoras (Corydoras aeneus), green corydoras, bronze catfish, lightspot corydoras or wavy catfish is a tropical freshwater fish in the "armored catfish" (Callichthyidae) family. It is widely distributed in South America on the eastern side of the Andes, from Colombia and Trinidad to the Río de la Plata basin.They were originally described as Hoplosoma aeneum by Theodore Gill in 1858 and have also been referred to as Callichthys aeneus.Reproduction occurs with the onset of the rainy season, which changes the water chemistry.Females spawn 10–20 egg-clutches with multiple males at a time, but an entire egg clutch is inseminated by sperm of a single male.Bronze cories have a unique method of insemination. When these fish reproduce, the male will present his abdomen to the female. The female will attach her mouth to the male's genital opening, creating the well-known "T-position" many Corydoras exhibit during courtship. The female will then drink the sperm. The sperm rapidly moves through her intestines and is discharged together with her eggs into a pouch formed by her pelvic fins. The female can then swim away and deposit the pouch somewhere else alone. Because the T-position is exhibited in other species than just C. aeneus, it is likely that they also exhibit this behavior.In the wild, eggs are laid on waterweeds.
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