Complex sentence: Species of "Grimpoteuthis" are assumed to have a worldwide distribution, living in the cold, abyssal depths ranging from 400 to 4,800 metres (13,000 ft).
Split into simpler sentences: Species of "Grimpoteuthis" are assumed to have a worldwide distribution. They can survive in extreme depths and have been found in the range of 400 to 4,800 metres (13,000 ft).