Fish

With over 32,000 described fish species, the varieties are endless. Most bony fishes are cold-blooded, covered in scales and breathe using gills—but there are exceptions to all of these rules.  

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Smithsonian scientist who discovered new species in her laboratory

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Five Questions for Carole Baldwin

Dr. Carole Baldwin's team discovered seven new species of fish "hiding" within three known species of a coral reef fish know...