#sorry if this is badly written/incoherent it's 2:42am and im about to go to sleep

[lotusbox]

hello tumblr, i have made my first (and probably last) post to ask scientific/marine questions out of curiosity since googling hasn't helped

1. if we can only go down ~4,000m underwater with submersibles, how did we know that colossal squid live around 6,000 meters under the surface?

2. if we've only seen a juvenile colossal squid about a week ago how did we know what the adults look like prior? and also how do we know that they become more opaque as they age?

2.5 i know that we know some things about them, but if the only things we've found of them are beaks in the stomachs of washed-up whales how do we deduce everything else from just that?

3. kind of a bonus question i only just thought of while writing this - if the blobfish looks like how it does when brought up to the surface since it's a deep-sea fish, how does the same not hold true for whales? i assume they dive at least 6,000-4,000m since they can go to colossal squid levels so is it because of their size? maybe a combination of also not staying there for as long too, or?

i have no idea if the right people (if any) will see this but i hope it does. thank you to anyone who answers and im sorry this is so long