A fish with a “semi-translucent,” pale pink body was seen swimming in the water, and researchers pulled it out for a closer look. The fish was just longer than 4 inches from head to tail ...

But, from the surface, the fish is impossible to see. Aside from the glint of its silver eyes, it is completely translucent, according to a study published Sept. 12 in the peer-reviewed journal ...

In a shallow stream of northern Brazil, a toothless “electric” creature weaved its way through the tangled roots and dead ...

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Usually growing from 3.5 to 4.3 inches as adults, these medium-sized fish are translucent silver on their sides and olive to iridescent pink on their back. Their most distinctive characteristic is ...

Usually growing from 3.5 to 4.3 inches as adults, these medium-sized fish are translucent silver on their sides and olive to iridescent pink on their back. Their most distinctive characteristic is ...