Thw first picture is kind of informative. After that there is a severe lack of information.
I also fail to see how nesting in a shell or general burrowing are "adaptations to aqautic life". Especially the last one is just a spider nesting a secluded space that happen to have some aquatic origin. The last 3 pictures are basicially just "waterproof silk".
The ones that adapt well enough will eventually have their offspring served up at Red Lobster. If Red Lobster is still around in a few hundred thousand years.