Scientists proved that the sea still holds some big mysteries after capturing footage of the colossal squid — the largest invertebrate on the planet — in its habitat for the first time.

The mysterious creature was filmed in the ocean near Antarctica. Scientists documented the juvenile, which could grow to more than 1,000 pounds.

A baby colossal squid was filmed in the deep sea by an ocean expedition near Antarctica. The world's largest squid has eluded cameras for 100 years.