'World's largest' fish breeding area with 60 million nests discovered in Antarctica

A breeding colony of 60 million fish has been discovered in Antarctica's ice-covered Weddell Sea. The vast colony, believed to be the world's largest, is home to the icefish, which has a see-through skull and transparent blood. The mapping of the area suggests a total extent of 240 square kilometres, which is roughly the size of the island of Malta.