How do Sperm Whales catch Giant Squid?

How do sperm whales catch giant squid? The rest  of the ocean’s behemoths fill their bellies by   filter-feeding on tons of easy-to-find swarms  of calorie-dense krill. But the sperm whale has   to meet its enormous calorie needs by actively  hunting down huge numbers of squid of all sizes.    Which seems tough, because squid are agile prey  with huge eyes and predator-deterring ink sacs.   For a while, it was hypothesized that sperm  whales used their built-in sonars to send out   incredibly powerful sound waves to stun  the squid before they gobbled them up.   But it turns out that the squid don't notice  sonar waves at all, which is actually a good thing   for the whale, because the sonar’s echolocation  feature allows a sperm whale to travel deep into   the darkest reaches of the ocean and find its prey  unnoticed. Then - at the last second of approach   - it rolls its body and swishes its tongue -  causing a whirlpool that sucks the nearby squid   into its mouth before they can react. When the  squid is especially big - like architeuthis, the   so-called giant squid, which can weigh up to a ton  - it can sometimes try to fight back. But by the   time it knows what’s going on, it’s already in the  whale’s mouth, so the whale almost always wins.