Topic | 水產百科網

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Perhaps the colours change in order to avoid predators in clear water?

A very reasonable assumption Matt. One of our most colourful cichlids is the “Cichlasoma” salvini. In the aquarium known to be aggressive when it is not being shy and hiding. In the wild it frequents habitats with murky water or areas with plenty of vegetation, tree roots etc in which to hide. In clear water it would stand out like a sore thumb. The second photo is of a C. salvini which came out of the clear waters of the Lake’s north shore a month ago. It took a while to realise what it was. This is one of several “Cichlasomas” in limbo waiting to be assigned a new genus after Kullander kicked several of our cichlids out of this genus in 1996.

With regard to Astyanax you mention in your database that confusion exists. Considering the widespread distribution of this genus, not surprising. There are about 60 species ...