That is an interesting point Dutch, it may well be the reason certain species (known and unknown) remain at such depths? I believe Giant Squid are capable of surviving varied depths including levels closer to the surface though, but their natural habitat remains hundreds to thousands of feet below. Specimens have been caught in commercial fishing nets and the few that have washed ashore were intact. Certainly those squid could well have been expired prior to being ensnared in the nets so pressure no longer had an effect. There are also the eye witness accounts of fisherman who claim to have seen a giant squid doing battle with a sperm whale. If those accounts are to believed it certainly suggests Giant Squid navigate beyond the deep. Actually whales have washed ashore with giant suction marks on their bodies lending truth to the accounts battles occur, but at what depth who knows?
Perhaps they remain at the depths they do because of the lower oxygen levels in the water? There have been species captured that where observed in controlled environments and it was found they parished when introduced in water with higher oxygen levels. It may be Giant Squid can adapt to higher levels abliet only for short periods of time? It is just so fascinating to know that remarkable species like the Giant Squid exist and the potential for new discovery continues to increase as we advance in knowledge and technology. I'm with you though it is likely a good thing that some remain as far down as they do.
Renee if you go to the CNN site there is a photo and video clip of the live Giant Squid that the Japanese scientist recently obtained. =)