Prepare to be blown away by the beauty of these 20 fish species ranked from the least to the most colorful.

From venomous spines to spike-covered genitalia, creatures around the world have unique features that set them apart.

Named the Halichoeres sanchezi, or the tailspot wrasse, the colorful species were found ... the last roboust scientific survey of the island’s fish species occurred more than two decades ago.

Other than that, not much else is known about how this species lives in the wild. The team did find one dusty crayfish in a thermal spring in Hungary. They believe that this stray fish either ...

Phenacoscorpius trispinis, or the noslit scorpionfish, was caught in a rocky area of Sagami Bay, on the east coast of Japan, ...

In other cases, however, the new species are delivered ... Cherax rayko belongs to a group of “colorful crayfish” that are part of the ornamental fish trade in Europe and Asia, researchers ...

This enormous, colorful coral-reef dweller is slow to reproduce ... filed a petition to list the wrasse under the Endangered Species Act. The fish needs this protection to aid in preventing greenhouse ...

In a bay off the coast of Japan, a new species of venomous fish was discovered ... Their spiky and sometimes colorful body helps them blend in on the reefs they typically call home, the ...