The world's largest invertebrate remained hidden from humanity until a tantalising glimpse 100 years ago. But it would be ...

Many of the known specimens were found in the stomach of sperm whales, whose diets may be 77 percent colossal squid. Only 12 complete specimens have been found, according to a 2015 study.

The new slimmed-down size estimate puts Perucetus in a similar range to sperm whales (80 tons, 20 meters long), which hunt large prey such as giant squid. More information: Downsizing a ...

such as sperm whales. They do not have irises or eyelids as they are used to the dimmest possible light. The giant squid weighs around 275kg and grows to up to 14m. The colossal squid weighs ...