An alien-like fish has been discovered by scientists.
An alien-like fish has been found in the Arctic by scientists
The variegated snailfish looks similar to a tadpole but glows bright green as its blood contains the "highest expression levels" of anti-freeze proteins ever found.
The unique species was found by researchers drilling deep into an Arctic iceberg.
David Gruber, a research associate at the American Museum of Natural History, said: "The snailfish was one of the few species of fish living among the icebergs, in the crevices.
"It was surprising that such a tiny fish could live in such an extremely cold environment without freezing."
The bright green glow is an evolutionary technique that helps maintain the fish's body temperature in the icy environment.
Gruber added: "Anti-freeze proteins stick to the surface of smaller ice crystals and slow or prevent them from growing into larger, and more dangerous, crystals.
"Fish from both the North and South Poles independently evolved these proteins."