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Discus fish
There is no real sexual dimorphism for this fish. In breeding form varieties, solid red discus (red melon, red cover) females are generally more red then males. Another characteristic of Symphysodon species is their care for the larvae. As for most cichlids, brood care is highly developed with both the parents caring for the young. Additionally, adult discus produce a secretion through their skin, which the larvae live off during their first few days. This behaviour has also been observed for Uaru species. However when bred in captivity the larvae will tend to live off their parents secretion for up to 2 weeks. Original public domain image from Flickr
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